@NoticedGlobe861 unfortunately, yes. I have 2-3 days ahead of myself to redownload the game, personally...
Converse with fellow players
I'm having the same issue, tbh, after a 45hr download, so, I feel your pain. Apparently some people are saying having the Tweaker helps, but, I had it, and it still corrupted/deleted itself. You need to delete all the files, which is a mess in and of itself, and redownlaod... The entire game. That's about the only solution I've found after looking through the internet for way too long.
I have the Tweaker, and my game still committed not-alive on me. Downloaded it almost immediately after a 45hr download of the game, since I was having trouble getting in after downloading the darn thing. Was able to play it twice, took a nap, then, less than half the time it took to download the darn game, it was gone =.=