Define worker as usual qobject. Thread functionality not necessary anymore:

remove corresponding run() method, i.e. privateTupdate().

UpdatePTUDevCtrl/worker.cpp

@@ -429,11 +429,11 @@ void Worker::stopProgressLoop() {
     displayProgressInMainWindow(MainWindow::STOP_PROGRESS_LOOP);
 }
 
-static std::once_flag once;
-void Worker::run() {
+//static std::once_flag once;
+//void Worker::run() {
     // user should not start the update process several times
-    std::call_once(once, &Worker::privateUpdate, this);
-}
+//    std::call_once(once, &Worker::privateUpdate, this);
+//}
 
 bool Worker::isRepositoryCorrupted() {
     QDir customerRepository(m_customerRepository);
@@ -480,6 +480,7 @@ bool Worker::repairCorruptedRepository() {
     return true;
 }
 
+#if 0
 void Worker::privateUpdate() {
     if (!m_mainWindow) {
         Utils::printCriticalErrorMsg("m_mainWindow NOT SET");
@@ -757,6 +758,7 @@ void Worker::privateUpdate() {
     // final messages: see destructor of UpdateProcessRunning subclass
     m_lastFailedUpdateStep = UPDATE_STEP::NONE;
 }
+#endif
 
 bool Worker::updateTriggerSet() {
     // repository is existent and not corrupted. check now if the ISMAS-trigger