@burnout426 Thanks for getting back to me! I've tried multiple things from that list, but none seem to be working. I deleted the Early Bird node in JSON, I used the System File Checker to repair any corrupted files, I don't have a Windows Family but I've logged into a local account on my pc just in case, I've uninstalled and re-installed Opera GX again, but nothing. I will now restart about 3-4 times, then the window stays open but shows a fully white square (no top bar or anything), and if I click in there, I get the "Not responding" pop-up that lets me pick whether to wait for or close the program.
Any other tips I might check out? Seriously have no idea what happened, I didn't change anything before this issue came up...