I try to update the thing but it gets anywhere between 40%-80% and then it says the the crpg launcher has stopped working. I have tried it multiple times but it still won't work.
Do you have multiple monitors by chance?
I was having this same issue, then I read a post by Dexxtaa where he was having the same issue while using multiple monitors. Try putting the launcher on the primary screen and turning off the secondary. Then run the update. It's what worked for me. If you aren't using multiple monitors then I'm not sure.