@Gravity667
I was having this exact same problem starting just last night. It would freeze after a few seconds after opening. I followed the suggestion of opening Opera GX through the command prompt and it worked.
"C:\Users\yourusername\AppData\Local\Programs\Opera\opera.exe" --disable-gpu --disable-extensions --no-experiments

I then went to Menu > Update & Recovery and checked for updates. The browser updated and I restarted the browser. I then closed the browser and opened it normally and it worked.