for me it seems that the problem was in the newest update of opera. Yet, I didn't need to uninstall anything. This is what I did, with all the bookmarks and history saved:
I navigated to the path were the problem occurred and deleted Opera Browser.lnk shortcut. When I looked where opera.exe is located (in my case C:\Users\Username\AppData\Local\Programs\Opera) and in the same folder I found opera-new.exe file I lunched this one and opera run without any problems. Latter I noticed that opera-new.exe file was automatically substituted with opera.exe file and the opera-new.exe was no longer there.Problem fixed, hopefully for u as well