instant shut down after opening the file

I had a trail version and had no problems on the same computer (Windows 10 pro). Yesterday I bought the licence and started a new document. After working a few hours on it , it suddenly stopped (simply dissapeared, was also not visible in task manager). After restarting (both the computer and the program) the same happened with the program after a few seconds. Each next attempt to start the program finished the same.
The only difference between my previous and current work is that I put a bit more images in notes, but not an extensive amount.

I will be grateful for tips what to do.

I would suggest you contact the Scrivener helpdesk direct for this. Sounds like a job for the developers.