I fixed the problem.I performed a (second) upgrade to windows 10,from withing the system.
After the upgrade finished,i tried Opera 31 again and now it works fine,without any crashes or freezes.
If anyone else has freezes and crashes with Opera 31 on windows 10,he should perform the upgrade to windows 10 again and after it,Opera will work fine.

How can you rename the profile folder?
Opera freezes constantly on windows 10 64bit and i am thinking to go back to windows 7 when it worked fine.
Will there be a solution for this problem?
I have to use Edge now because Opera freezes and crashes in any site.

The developers know about this issue?
Will they fix it in the next version?

Hi,i upgraded to windows 10 from 7 and Opera 31 does not respond when I open the browser.
A few days ago it opened the page and kept crashing after 5 minutes in any webpage,now it does not respond when I open it,it freezes completely and stays frozen,and I have to close it with the task manager.
I tried disabling all the extensions but the problem remains,it must be a problem with Opera,because other browsers that I tried (Firefox and Edge) work ok.
I tried uninstalling and reinstalling Opera,both the stable 31 and the beta 32 version and it still doesn't work,it freezes when I open it,in any webpage and stays frozen.
Are Opera developers aware of this problem with windows 10 and is there any available solution?