The program turns itself off every night!

The program turns itself off every night, and works during the day.

I think there is some kind of critical error and it turns off.

Why can this happen?

maybe proxies and the option to stop projects on proxies down? Or maybe the detection of no network which stops it (global option-> advanced).

the program does not stop, but closes completely!

then probably due to memory issues?

I have 64 GB of memory on my computer, and the program uses only 2-3 GB

Thats the issue then, because it's a 32 bit program , not being able to allocate more than 3.8GB.