Can't Open Client

Okay weird issue here Tried to launch a game but my laptop crashed. Restarted it, tried to open the League Client and, for some reason, it had changed from EUW to NA and seemingly forgotten all my login. I changed it back, logged in and the game loaded but it crashed again. I reset my laptop for the second time and now League won't open at all. I click it as admin, I see the circular blue loading bar next to the pointer and nothing. It won't open and it refuses to open no matter what I try. Any ideas? I don't want to reinstall it if I can avoid it. Takes too long to patch a fresh League with my connection...
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