diff --git a/src/luaengineapp/app.lua b/src/luaengineapp/app.lua
index 3a17cf1..5dc35ce 100644
--- a/src/luaengineapp/app.lua
+++ b/src/luaengineapp/app.lua
@@ -46,7 +46,7 @@ function main()
     layoutAddWidget(mainLayout, pushButton1)
     connect(pushButton1, "clicked()", "showDialog")
 
-    setWidgetFixedSize(mainWindow)
+    setWidgetFixed(mainWindow)
     showWidget(mainWindow, ShowNormal)
     return GuiExecuted
 end
@@ -71,7 +71,7 @@ function showDialog(pushButton)
     local dialogButton = createPushButton("Close", dialog)
     layoutAddWidget(buttonLayout, dialogButton)
     connect(dialogButton, "clicked()", "closeDialog")
-    setWidgetFixedSize(dialog)
+    setWidgetFixed(dialog)
     executeWidget(dialog)
     delete(dialog, DeleteInstant)
 end
diff --git a/src/luaengineapp/main.cpp b/src/luaengineapp/main.cpp
index cd6df76..06ae604 100644
--- a/src/luaengineapp/main.cpp
+++ b/src/luaengineapp/main.cpp
@@ -28,7 +28,9 @@
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
+#ifdef _WIN32
     QApplication::setStyle(new LuaEngineStyle());
+#endif
 
 #ifdef _WIN32
 #if QT_VERSION >= 0x050400
@@ -45,14 +47,16 @@ int main(int argc, char *argv[])
 #endif
 #endif
 
+#ifdef _WIN32
     QFile *luaEngineStyleFile = new QFile(":/luaenginestyle/luaenginestyle.qss");
     if (luaEngineStyleFile->open(QFile::ReadOnly))
     {
         a.setStyleSheet(QString::fromUtf8(luaEngineStyleFile->readAll()));
     }
     delete luaEngineStyleFile;
+#endif
 
-    QFile luaScript(":/lua/edit.lua");
+    QFile luaScript(":/lua/app.lua");
 
     LuaEngineGui luaEngineGui;
     luaEngineGui.executeLuaScript(&luaScript);
@@ -79,9 +83,6 @@ int main(int argc, char *argv[])
             return 1;
         }
     }
-    else {
-        return 1;
-    }
 
-    return a.exec();
+    return 1;
 }
diff --git a/src/luaenginegui/luaengine/LuaEngineGui.cpp b/src/luaenginegui/luaengine/LuaEngineGui.cpp
index a9dd2be..f8bbf38 100644
--- a/src/luaenginegui/luaengine/LuaEngineGui.cpp
+++ b/src/luaenginegui/luaengine/LuaEngineGui.cpp
@@ -173,7 +173,11 @@ int LuaEngineGui::showFileDialog(lua_State *L_p)
         }
     }
     QFileDialog fileDialog(parent);
+#if QT_VERSION >= 0x050900
     fileDialog.setWindowFlag(Qt::WindowContextHelpButtonHint, false);
+#else
+    fileDialog.setWindowFlags(fileDialog.windowFlags()^Qt::WindowContextHelpButtonHint);
+#endif
     fileDialog.setWindowTitle(dialogTitle);
     fileDialog.setAcceptMode(fileAcceptMode);
     fileDialog.setNameFilter(fileFormats);
@@ -531,7 +535,11 @@ int LuaEngineGui::createDialog(lua_State *L_p)
         }
     }
     QDialog *dialog = new QDialog(parent);
+#if QT_VERSION >= 0x050900
     dialog->setWindowFlag(Qt::WindowContextHelpButtonHint, false);
+#else
+    dialog->setWindowFlags(dialog->windowFlags()^Qt::WindowContextHelpButtonHint);
+#endif
     dialog->setObjectName(nameForPointer(dialog));
     dialog->setWindowTitle(windowTitle);
     pushPointer(L_p, dialog);