So after a bunch of fiddling around, I managed to get the game to work last week. However, there was the update last night, and when I tried this morning, the game no longer even works
This time, clicking PLAY does absolutely nothing. The PSO2 icon in the Start Menu has a white bar, suggesting it's actually running, but I can't even find a process anywhere. It's as if nothing is ever executed.
Tried fiddling around with it some more, like changing the folder ownerhisp from SYSTEM to TruestedInstaller, since that's what most of the other Windows Apps are using. It got the launcher to work again, however, it had the effect of causing the launcher to redownload the 90GB again.
I'm pretty sure it's going to just break again... but here's to wasting my life some more.