So i'm back to work with zenno but still i have same problem. This is impossible to work. I just spend 3 hours to make my template but not project maker crashes same way as i told before. And i can not save my work. This is really big problem....................
Often i have the same problem, but the following helps a little bit:
1. Go to task manager --> Processes
2. Click on "view"
3. Choose columns (I have german windows 7, don't know if thats the right translation)
4. Click on handles
Now sort your processes by handles and close programs that are using to many handles. Skype for instance has over 800 handles, but you don't need it for template editing.
You should be able to continue your template if you free some hundred handles. But you will get the same error again if you reach a specific treshold, so better don't make your template to complicated. Using a better machine also helps.