Can't even use new client

About a month ago I was still using the new client but one day I went to play some good non tilting league and it said my league files were corrupt, so after an uninstall and reinstall I trade to go back to the new client and it will no longer update to it, instead it freezes for a minute, tried multiple times, and after clicking launch it doesn't open league and causes me to uninstall and reinstall again, if there are any fixes please let me know or if I'm screwed when they switch to the new client on the 24th. Thanks in advance.