osu was working fine for me, until one day when I launched it there was the original installer screen that said it was updating. From there on, my osu application says 2007-2015 on the bottom left, has an old background, and there is a lot of input lag for some reason. I tried uninstalling/reinstalling many times, but every time it won't install the latest osu. Also there isn't anything that says that I need to update. Please help, thanks.