So after fumbling a lot with settings here and there, I finally figured out what could have caused the unspecified error -2147 etc etc that plagued some of us. Someone gave a handy .exe file that could ran Maple in this case, but only at fullscreen. I now figured out how to run it normally and it has to do with your monitor refresh rate. Mine was set to 59 FPS, now it's set to 60 FPS and maple finally runs with the regular MapleRoyals.exe (and therefore also windowed mode ). (for windows 10) : Simply go to screen settings and then to advanced options (at the bottom) and click the second tab, then change refresh rate to 60 FPS. If you use another operating system try googling : "how to change refresh rate for [OS]" I hope this helped someone
For me this thing was fixed months ago. The reason it had the problem was that the screen couldn't change to 60hz and even if I tried to change it always reverted back to 59hz later. The fix was to create a custom resolution with 60hz in the AMD reason settings and apply it.