diff --git a/po/de/laview-desktop.po b/po/de/laview-desktop.po
index 9d5762a..9423931 100644
--- a/po/de/laview-desktop.po
+++ b/po/de/laview-desktop.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: laview-desktop\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-08 02:06+0300\n"
+"POT-Creation-Date: 2016-06-23 23:02+0300\n"
 "PO-Revision-Date: 2015-10-24 20:19+0300\n"
 "Last-Translator:  <backbone@backbone.ws>\n"
 "Language-Team: German\n"
@@ -25,7 +25,7 @@ msgstr ""
 msgid "It is too lazy to select a directory each time..."
 msgstr ""
 
-#: src/MainWindow.vala:31 ui/glade/laview-desktop.glade.h:14
+#: src/MainWindow.vala:31 ui/glade/laview-desktop.glade.h:15
 msgid "LAview Desktop"
 msgstr ""
 
@@ -33,10 +33,10 @@ msgstr ""
 msgid "We're ready, Commander! Select or create a template. :-)"
 msgstr ""
 
-#: src/MainWindow.vala:82 src/MainWindow.vala:125 src/MainWindow.vala:176
-#: src/MainWindow.vala:204 src/MainWindow.vala:216 src/MainWindow.vala:232
-#: src/MainWindow.vala:250 src/MainWindow.vala:288 src/MainWindow.vala:356
-#: src/SubprocessDialog.vala:43 src/Utils.vala:21 src/main.vala:64
+#: src/MainWindow.vala:82 src/MainWindow.vala:125 src/MainWindow.vala:184
+#: src/MainWindow.vala:211 src/MainWindow.vala:222 src/MainWindow.vala:237
+#: src/MainWindow.vala:255 src/MainWindow.vala:298 src/MainWindow.vala:366
+#: src/SubprocessDialog.vala:53 src/Utils.vala:21 src/main.vala:64
 #: src/main.vala:83
 msgid "Error: "
 msgstr ""
@@ -45,7 +45,7 @@ msgstr ""
 msgid "Select templates"
 msgstr ""
 
-#: src/MainWindow.vala:92 src/MainWindow.vala:316
+#: src/MainWindow.vala:92 src/MainWindow.vala:326
 msgid "_Cancel"
 msgstr ""
 
@@ -53,47 +53,47 @@ msgstr ""
 msgid "_Open"
 msgstr ""
 
-#: src/MainWindow.vala:170
+#: src/MainWindow.vala:178
 msgid "After composing all objects print the document."
 msgstr ""
 
-#: src/MainWindow.vala:172
+#: src/MainWindow.vala:180
 msgid "Select an object first."
 msgstr ""
 
-#: src/MainWindow.vala:228
+#: src/MainWindow.vala:233
 msgid "=== Print to PDF file... ===\n"
 msgstr ""
 
-#: src/MainWindow.vala:294
+#: src/MainWindow.vala:304
 msgid "Document analized, select an object and set it's properties."
 msgstr ""
 
-#: src/MainWindow.vala:299
+#: src/MainWindow.vala:309
 msgid "Press 'Properties' button to compose the object."
 msgstr ""
 
-#: src/MainWindow.vala:310
+#: src/MainWindow.vala:320
 msgid "Prepare the document first! >;-]"
 msgstr ""
 
-#: src/MainWindow.vala:314
+#: src/MainWindow.vala:324
 msgid "Select destination"
 msgstr ""
 
-#: src/MainWindow.vala:317
+#: src/MainWindow.vala:327
 msgid "_Save"
 msgstr ""
 
-#: src/MainWindow.vala:349
+#: src/MainWindow.vala:359
 msgid "bytes of"
 msgstr ""
 
-#: src/MainWindow.vala:350
+#: src/MainWindow.vala:360
 msgid "bytes copied/saved"
 msgstr ""
 
-#: src/MainWindow.vala:353
+#: src/MainWindow.vala:363
 msgid "Save/Copy operation complete! :-)"
 msgstr ""
 
@@ -105,7 +105,7 @@ msgstr ""
 msgid "File "
 msgstr ""
 
-#: src/SubprocessDialog.vala:38
+#: src/SubprocessDialog.vala:48
 msgid "Error running subprocess."
 msgstr ""
 
@@ -151,77 +151,81 @@ msgid "LyX path on Windows"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:10
-msgid "LaTeXmk path on Windows"
+msgid "LaTeXmk.pl path on Windows"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:11
-msgid "Common"
+msgid "Perl path on Windows"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:12
-msgid "Object plugins"
+msgid "Common"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:13
+msgid "Object plugins"
+msgstr ""
+
+#: ui/glade/laview-desktop.glade.h:14
 msgid "Data plugins"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:15
+#: ui/glade/laview-desktop.glade.h:16
 msgid "_Application"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:16
+#: ui/glade/laview-desktop.glade.h:17
 msgid "_Help"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:17
+#: ui/glade/laview-desktop.glade.h:18
 msgid "Create a new template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:18
+#: ui/glade/laview-desktop.glade.h:19
 msgid "Open a template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:19
+#: ui/glade/laview-desktop.glade.h:20
 msgid "Change selected template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:20
+#: ui/glade/laview-desktop.glade.h:21
 msgid "Delete selected template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:21
+#: ui/glade/laview-desktop.glade.h:22
 msgid "Document object preparing"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:22
+#: ui/glade/laview-desktop.glade.h:23
 msgid "View and print the document"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:23
+#: ui/glade/laview-desktop.glade.h:24
 msgid "Edit the result document"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:24
+#: ui/glade/laview-desktop.glade.h:25
 msgid "Save the document as..."
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:25
+#: ui/glade/laview-desktop.glade.h:26
 msgid "Application preferences"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:26
+#: ui/glade/laview-desktop.glade.h:27
 msgid "Help and reference"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:27
+#: ui/glade/laview-desktop.glade.h:28
 msgid "Close the application"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:28
+#: ui/glade/laview-desktop.glade.h:29
 msgid "Templates"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:29
+#: ui/glade/laview-desktop.glade.h:30
 msgid "Document Objects"
 msgstr ""
diff --git a/po/laview-desktop.pot b/po/laview-desktop.pot
index 968aba3..84d7336 100644
--- a/po/laview-desktop.pot
+++ b/po/laview-desktop.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: laview-desktop\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-08 02:06+0300\n"
+"POT-Creation-Date: 2016-06-23 23:02+0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -25,7 +25,7 @@ msgstr ""
 msgid "It is too lazy to select a directory each time..."
 msgstr ""
 
-#: src/MainWindow.vala:31 ui/glade/laview-desktop.glade.h:14
+#: src/MainWindow.vala:31 ui/glade/laview-desktop.glade.h:15
 msgid "LAview Desktop"
 msgstr ""
 
@@ -33,10 +33,10 @@ msgstr ""
 msgid "We're ready, Commander! Select or create a template. :-)"
 msgstr ""
 
-#: src/MainWindow.vala:82 src/MainWindow.vala:125 src/MainWindow.vala:176
-#: src/MainWindow.vala:204 src/MainWindow.vala:216 src/MainWindow.vala:232
-#: src/MainWindow.vala:250 src/MainWindow.vala:288 src/MainWindow.vala:356
-#: src/SubprocessDialog.vala:43 src/Utils.vala:21 src/main.vala:64
+#: src/MainWindow.vala:82 src/MainWindow.vala:125 src/MainWindow.vala:184
+#: src/MainWindow.vala:211 src/MainWindow.vala:222 src/MainWindow.vala:237
+#: src/MainWindow.vala:255 src/MainWindow.vala:298 src/MainWindow.vala:366
+#: src/SubprocessDialog.vala:53 src/Utils.vala:21 src/main.vala:64
 #: src/main.vala:83
 msgid "Error: "
 msgstr ""
@@ -45,7 +45,7 @@ msgstr ""
 msgid "Select templates"
 msgstr ""
 
-#: src/MainWindow.vala:92 src/MainWindow.vala:316
+#: src/MainWindow.vala:92 src/MainWindow.vala:326
 msgid "_Cancel"
 msgstr ""
 
@@ -53,47 +53,47 @@ msgstr ""
 msgid "_Open"
 msgstr ""
 
-#: src/MainWindow.vala:170
+#: src/MainWindow.vala:178
 msgid "After composing all objects print the document."
 msgstr ""
 
-#: src/MainWindow.vala:172
+#: src/MainWindow.vala:180
 msgid "Select an object first."
 msgstr ""
 
-#: src/MainWindow.vala:228
+#: src/MainWindow.vala:233
 msgid "=== Print to PDF file... ===\n"
 msgstr ""
 
-#: src/MainWindow.vala:294
+#: src/MainWindow.vala:304
 msgid "Document analized, select an object and set it's properties."
 msgstr ""
 
-#: src/MainWindow.vala:299
+#: src/MainWindow.vala:309
 msgid "Press 'Properties' button to compose the object."
 msgstr ""
 
-#: src/MainWindow.vala:310
+#: src/MainWindow.vala:320
 msgid "Prepare the document first! >;-]"
 msgstr ""
 
-#: src/MainWindow.vala:314
+#: src/MainWindow.vala:324
 msgid "Select destination"
 msgstr ""
 
-#: src/MainWindow.vala:317
+#: src/MainWindow.vala:327
 msgid "_Save"
 msgstr ""
 
-#: src/MainWindow.vala:349
+#: src/MainWindow.vala:359
 msgid "bytes of"
 msgstr ""
 
-#: src/MainWindow.vala:350
+#: src/MainWindow.vala:360
 msgid "bytes copied/saved"
 msgstr ""
 
-#: src/MainWindow.vala:353
+#: src/MainWindow.vala:363
 msgid "Save/Copy operation complete! :-)"
 msgstr ""
 
@@ -105,7 +105,7 @@ msgstr ""
 msgid "File "
 msgstr ""
 
-#: src/SubprocessDialog.vala:38
+#: src/SubprocessDialog.vala:48
 msgid "Error running subprocess."
 msgstr ""
 
@@ -151,77 +151,81 @@ msgid "LyX path on Windows"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:10
-msgid "LaTeXmk path on Windows"
+msgid "LaTeXmk.pl path on Windows"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:11
-msgid "Common"
+msgid "Perl path on Windows"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:12
-msgid "Object plugins"
+msgid "Common"
 msgstr ""
 
 #: ui/glade/laview-desktop.glade.h:13
+msgid "Object plugins"
+msgstr ""
+
+#: ui/glade/laview-desktop.glade.h:14
 msgid "Data plugins"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:15
+#: ui/glade/laview-desktop.glade.h:16
 msgid "_Application"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:16
+#: ui/glade/laview-desktop.glade.h:17
 msgid "_Help"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:17
+#: ui/glade/laview-desktop.glade.h:18
 msgid "Create a new template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:18
+#: ui/glade/laview-desktop.glade.h:19
 msgid "Open a template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:19
+#: ui/glade/laview-desktop.glade.h:20
 msgid "Change selected template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:20
+#: ui/glade/laview-desktop.glade.h:21
 msgid "Delete selected template"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:21
+#: ui/glade/laview-desktop.glade.h:22
 msgid "Document object preparing"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:22
+#: ui/glade/laview-desktop.glade.h:23
 msgid "View and print the document"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:23
+#: ui/glade/laview-desktop.glade.h:24
 msgid "Edit the result document"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:24
+#: ui/glade/laview-desktop.glade.h:25
 msgid "Save the document as..."
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:25
+#: ui/glade/laview-desktop.glade.h:26
 msgid "Application preferences"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:26
+#: ui/glade/laview-desktop.glade.h:27
 msgid "Help and reference"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:27
+#: ui/glade/laview-desktop.glade.h:28
 msgid "Close the application"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:28
+#: ui/glade/laview-desktop.glade.h:29
 msgid "Templates"
 msgstr ""
 
-#: ui/glade/laview-desktop.glade.h:29
+#: ui/glade/laview-desktop.glade.h:30
 msgid "Document Objects"
 msgstr ""
diff --git a/po/ru/laview-desktop.po b/po/ru/laview-desktop.po
index d10e218..fa71c29 100644
--- a/po/ru/laview-desktop.po
+++ b/po/ru/laview-desktop.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: laview-desktop\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-08 02:06+0300\n"
+"POT-Creation-Date: 2016-06-23 23:02+0300\n"
 "PO-Revision-Date: 2015-10-24 20:19+0300\n"
 "Last-Translator:  <backbone@backbone.ws>\n"
 "Language-Team: Russian\n"
@@ -26,7 +26,7 @@ msgstr "Директория для сохранения pdf файлов (по
 msgid "It is too lazy to select a directory each time..."
 msgstr "Слишком лениво выбирать каждый раз директорию для сохранения..."
 
-#: src/MainWindow.vala:31 ui/glade/laview-desktop.glade.h:14
+#: src/MainWindow.vala:31 ui/glade/laview-desktop.glade.h:15
 msgid "LAview Desktop"
 msgstr "Рабочее окно LAview"
 
@@ -34,10 +34,10 @@ msgstr "Рабочее окно LAview"
 msgid "We're ready, Commander! Select or create a template. :-)"
 msgstr "Мы готовы, Командир! Выберите или создайте шаблон. :-)"
 
-#: src/MainWindow.vala:82 src/MainWindow.vala:125 src/MainWindow.vala:176
-#: src/MainWindow.vala:204 src/MainWindow.vala:216 src/MainWindow.vala:232
-#: src/MainWindow.vala:250 src/MainWindow.vala:288 src/MainWindow.vala:356
-#: src/SubprocessDialog.vala:43 src/Utils.vala:21 src/main.vala:64
+#: src/MainWindow.vala:82 src/MainWindow.vala:125 src/MainWindow.vala:184
+#: src/MainWindow.vala:211 src/MainWindow.vala:222 src/MainWindow.vala:237
+#: src/MainWindow.vala:255 src/MainWindow.vala:298 src/MainWindow.vala:366
+#: src/SubprocessDialog.vala:53 src/Utils.vala:21 src/main.vala:64
 #: src/main.vala:83
 msgid "Error: "
 msgstr "Ошибка: "
@@ -46,7 +46,7 @@ msgstr "Ошибка: "
 msgid "Select templates"
 msgstr "Выберите шаблоны"
 
-#: src/MainWindow.vala:92 src/MainWindow.vala:316
+#: src/MainWindow.vala:92 src/MainWindow.vala:326
 msgid "_Cancel"
 msgstr "_Отмена"
 
@@ -54,47 +54,47 @@ msgstr "_Отмена"
 msgid "_Open"
 msgstr "_Открыть"
 
-#: src/MainWindow.vala:170
+#: src/MainWindow.vala:178
 msgid "After composing all objects print the document."
 msgstr "После компоновки всех объектов напечатайте документ."
 
-#: src/MainWindow.vala:172
+#: src/MainWindow.vala:180
 msgid "Select an object first."
 msgstr "Сначала выберите объект."
 
-#: src/MainWindow.vala:228
+#: src/MainWindow.vala:233
 msgid "=== Print to PDF file... ===\n"
 msgstr "=== Печать в PDF файл... ===\n"
 
-#: src/MainWindow.vala:294
+#: src/MainWindow.vala:304
 msgid "Document analized, select an object and set it's properties."
 msgstr "Документ проанализирован, выберите объект и установите его свойства."
 
-#: src/MainWindow.vala:299
+#: src/MainWindow.vala:309
 msgid "Press 'Properties' button to compose the object."
 msgstr "Нажмите кнопку 'Свойства' для компоновки объекта."
 
-#: src/MainWindow.vala:310
+#: src/MainWindow.vala:320
 msgid "Prepare the document first! >;-]"
 msgstr "Сначала подготовьте документ! >;-]"
 
-#: src/MainWindow.vala:314
+#: src/MainWindow.vala:324
 msgid "Select destination"
 msgstr "Выберите назначение"
 
-#: src/MainWindow.vala:317
+#: src/MainWindow.vala:327
 msgid "_Save"
 msgstr "_Сохранить"
 
-#: src/MainWindow.vala:349
+#: src/MainWindow.vala:359
 msgid "bytes of"
 msgstr "байт из"
 
-#: src/MainWindow.vala:350
+#: src/MainWindow.vala:360
 msgid "bytes copied/saved"
 msgstr "байт скопировано/сохранено"
 
-#: src/MainWindow.vala:353
+#: src/MainWindow.vala:363
 msgid "Save/Copy operation complete! :-)"
 msgstr "Операция сохранения/копирования завершена! :-)"
 
@@ -106,7 +106,7 @@ msgstr " не найден"
 msgid "File "
 msgstr "Файл "
 
-#: src/SubprocessDialog.vala:38
+#: src/SubprocessDialog.vala:48
 msgid "Error running subprocess."
 msgstr "Ошибка запуска подпроцесса."
 
@@ -152,77 +152,81 @@ msgid "LyX path on Windows"
 msgstr "Путь к LyX под Windows"
 
 #: ui/glade/laview-desktop.glade.h:10
-msgid "LaTeXmk path on Windows"
-msgstr "Путь к LaTeXmk под Windows"
+msgid "LaTeXmk.pl path on Windows"
+msgstr "Путь к скрипту LaTeXmk.pl под Windows"
 
 #: ui/glade/laview-desktop.glade.h:11
+msgid "Perl path on Windows"
+msgstr "Путь к Perl под Windows"
+
+#: ui/glade/laview-desktop.glade.h:12
 msgid "Common"
 msgstr "Общие"
 
-#: ui/glade/laview-desktop.glade.h:12
+#: ui/glade/laview-desktop.glade.h:13
 msgid "Object plugins"
 msgstr "Плагины объектов"
 
-#: ui/glade/laview-desktop.glade.h:13
+#: ui/glade/laview-desktop.glade.h:14
 msgid "Data plugins"
 msgstr "Плагины данных"
 
-#: ui/glade/laview-desktop.glade.h:15
+#: ui/glade/laview-desktop.glade.h:16
 msgid "_Application"
 msgstr "_Приложение"
 
-#: ui/glade/laview-desktop.glade.h:16
+#: ui/glade/laview-desktop.glade.h:17
 msgid "_Help"
 msgstr "_Помощь"
 
-#: ui/glade/laview-desktop.glade.h:17
+#: ui/glade/laview-desktop.glade.h:18
 msgid "Create a new template"
 msgstr "Создать новый шаблон"
 
-#: ui/glade/laview-desktop.glade.h:18
+#: ui/glade/laview-desktop.glade.h:19
 msgid "Open a template"
 msgstr "Открыть шаблон"
 
-#: ui/glade/laview-desktop.glade.h:19
+#: ui/glade/laview-desktop.glade.h:20
 msgid "Change selected template"
 msgstr "Изменить выбранный шаблон"
 
-#: ui/glade/laview-desktop.glade.h:20
+#: ui/glade/laview-desktop.glade.h:21
 msgid "Delete selected template"
 msgstr "Удалить выбранный шаблон"
 
-#: ui/glade/laview-desktop.glade.h:21
+#: ui/glade/laview-desktop.glade.h:22
 msgid "Document object preparing"
 msgstr "Подготовка объекта документа"
 
-#: ui/glade/laview-desktop.glade.h:22
+#: ui/glade/laview-desktop.glade.h:23
 msgid "View and print the document"
 msgstr "Просмотр и печать документа"
 
-#: ui/glade/laview-desktop.glade.h:23
+#: ui/glade/laview-desktop.glade.h:24
 msgid "Edit the result document"
 msgstr "Редактировать полученный документ"
 
-#: ui/glade/laview-desktop.glade.h:24
+#: ui/glade/laview-desktop.glade.h:25
 msgid "Save the document as..."
 msgstr "Сохранить документ как..."
 
-#: ui/glade/laview-desktop.glade.h:25
+#: ui/glade/laview-desktop.glade.h:26
 msgid "Application preferences"
 msgstr "Параметры приложения"
 
-#: ui/glade/laview-desktop.glade.h:26
+#: ui/glade/laview-desktop.glade.h:27
 msgid "Help and reference"
 msgstr "Помощь и справка"
 
-#: ui/glade/laview-desktop.glade.h:27
+#: ui/glade/laview-desktop.glade.h:28
 msgid "Close the application"
 msgstr "Закрыть приложение"
 
-#: ui/glade/laview-desktop.glade.h:28
+#: ui/glade/laview-desktop.glade.h:29
 msgid "Templates"
 msgstr "Шаблоны"
 
-#: ui/glade/laview-desktop.glade.h:29
+#: ui/glade/laview-desktop.glade.h:30
 msgid "Document Objects"
 msgstr "Объекты документа"
diff --git a/src/PreferencesWindow.vala b/src/PreferencesWindow.vala
index 691cd49..ee33c7b 100644
--- a/src/PreferencesWindow.vala
+++ b/src/PreferencesWindow.vala
@@ -11,6 +11,7 @@ namespace LAview.Desktop {
 		Gtk.ListStore liststore_objects;
 		FileChooserButton filechooserbutton_lyx;
 		FileChooserButton filechooserbutton_latexmk;
+		FileChooserButton filechooserbutton_perl;
 
 		public PreferencesDialog (Gtk.Application application, Window parent) throws Error {
 			var builder = new Builder ();
@@ -26,12 +27,14 @@ namespace LAview.Desktop {
 			liststore_objects = builder.get_object ("liststore_protocol_objects") as Gtk.ListStore;
 			filechooserbutton_lyx = builder.get_object ("filechooserbutton_lyx") as FileChooserButton;
 			filechooserbutton_latexmk = builder.get_object ("filechooserbutton_latexmk") as FileChooserButton;
+			filechooserbutton_perl = builder.get_object ("filechooserbutton_perl") as FileChooserButton;
 
 			fill_liststore_data ();
 			fill_liststore_objects ();
 
 			filechooserbutton_lyx.set_filename (AppCore.core.lyx_path);
-			filechooserbutton_latexmk.set_filename (AppCore.core.latexmk_path);
+			filechooserbutton_latexmk.set_filename (AppCore.core.latexmk_pl_path);
+			filechooserbutton_perl.set_filename (AppCore.core.perl_path);
 		}
 
 		void fill_liststore_data () {
@@ -68,7 +71,12 @@ namespace LAview.Desktop {
 
 		[CCode (instance_pos = -1)]
 		public void latexmk_file_set (FileChooserButton chooser) {
-			AppCore.core.latexmk_path = chooser.get_filename ();
+			AppCore.core.latexmk_pl_path = chooser.get_filename ();
+		}
+
+		[CCode (instance_pos = -1)]
+		public void perl_file_set (FileChooserButton chooser) {
+			AppCore.core.perl_path = chooser.get_filename ();
 		}
 	}
 }
diff --git a/src/SubprocessDialog.vala b/src/SubprocessDialog.vala
index 2963bed..d16ad51 100644
--- a/src/SubprocessDialog.vala
+++ b/src/SubprocessDialog.vala
@@ -50,7 +50,7 @@ namespace LAview.Desktop {
 				dialog.hide ();
 
 			} catch (Error err) {
-				textview_stderrout.buffer.text += _("Error: ")+err.message;
+				textview_stderrout.buffer.text += _("Error: ")+err.message+"\n";
 				scroll_down ();
 				if (sp != null) {
 					var ds_err = new DataInputStream(sp.get_stderr_pipe());
diff --git a/src/main.vala b/src/main.vala
index ec6e74f..23c9417 100644
--- a/src/main.vala
+++ b/src/main.vala
@@ -80,7 +80,7 @@ namespace LAview.Desktop {
 				return app.run (args);
 
 			} catch (Error e) {
-				stderr.puts (_("Error: ")+e.message);
+				stderr.puts (_("Error: ")+e.message+"\n");
 				stderr.printf (_("Run '%s --help' to see a full list of available command line options.\n"), args[0]);
 				return e.code;
 			}
diff --git a/ui/glade/laview-desktop.glade b/ui/glade/laview-desktop.glade
index 46a7929..be62ff9 100644
--- a/ui/glade/laview-desktop.glade
+++ b/ui/glade/laview-desktop.glade
@@ -231,13 +231,24 @@
                       <object class="GtkLabel" id="label6">
                         <property name="visible">True</property>
                         <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">LaTeXmk path on Windows</property>
+                        <property name="label" translatable="yes">LaTeXmk.pl path on Windows</property>
                         <property name="xalign">0</property>
                       </object>
                       <packing>
                         <property name="left_attach">0</property>
                         <property name="top_attach">2</property>
                       </packing>
+                    </child>                    <child>
+                      <object class="GtkLabel" id="label7">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Perl path on Windows</property>
+                        <property name="xalign">0</property>
+                      </object>
+                      <packing>
+                        <property name="left_attach">0</property>
+                        <property name="top_attach">3</property>
+                      </packing>
                     </child>
                     <child>
                       <object class="GtkFileChooserButton" id="filechooserbutton_lyx">
@@ -263,6 +274,18 @@
                         <property name="top_attach">2</property>
                       </packing>
                     </child>
+                    <child>
+                      <object class="GtkFileChooserButton" id="filechooserbutton_perl">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="hexpand">True</property>
+                        <signal name="file-set" handler="laview_desktop_preferences_dialog_perl_file_set" swapped="no"/>
+                      </object>
+                      <packing>
+                        <property name="left_attach">1</property>
+                        <property name="top_attach">3</property>
+                      </packing>
+                    </child>
                   </object>
                 </child>
               </object>