Nothing happened after clicking on "New Project"

I would create a new project so i clicked on "New Project" in the welcome dialog. But nothing happens. I tried "File->New->Project" and nothing happened too. It took me some time to figure out that i have defined a not existing default project directory (i had imported the settings from another installation). It would be fine, if you can display an according error message in this case, and also in the settings dialog. When i enter a path manually instead of selecting one also no message or hint is displayed.