Don't use QSTRINGBUILDER as it may cause crashes ...

- closes #367

src/defines.pri

@@ -15,7 +15,9 @@ win32 {
     LIBS += User32.lib Ole32.lib Shell32.lib ShlWapi.lib Gdi32.lib ComCtl32.lib
 }
 
-DEFINES *= QT_NO_URL_CAST_FROM_STRING QT_USE_FAST_OPERATOR_PLUS QT_USE_FAST_CONCATENATION
+DEFINES *= QT_NO_URL_CAST_FROM_STRING
+# Apparently, it may cause crashes on some machines
+#DEFINES *= QT_USE_QSTRINGBUILDER
 
 ##It won't compile on windows with this define. Some bug in qtsingleapp / qvector template
 !win32: !CONFIG(debug, debug|release): DEFINES *= QT_NO_DEBUG_OUTPUT

src/lib/3rdparty/qtwin.h

@@ -60,7 +60,6 @@ public:
     static bool isCompositionEnabled();
     static QColor colorizationColor();
 
-public slots:
     static void setupJumpList();
 
 private:

src/lib/network/networkmanager.cpp

@@ -473,7 +473,7 @@ void NetworkManager::loadCertificates()
     }
     //Local Certificates
 #ifdef Q_WS_WIN
-    QDirIterator it_(mApp->getActiveProfilPath() + "certificates", QDir::Files, QDirIterator::FollowSymlinks | QDirIterator::Subdirectories);
+    QDirIterator it_(mApp->currentProfilePath() + "certificates", QDir::Files, QDirIterator::FollowSymlinks | QDirIterator::Subdirectories);
     while (it_.hasNext()) {
         QString filePath = it_.next();
         if (!filePath.endsWith(".crt")) {