I haven't open osu! from May of this year on one of pc. Yeasterday I tried to play, but I can't log in, because my version of osu! is outdated. It trying to update, but after some time it says, what I have connection problems (I can download 3gb game in 15 mins). I tried to run using administrator rights, but it doen't help. I have no rating and can't downgrade to stable version. Any ideas how to solve this problem? 
osu! version: 20170503.4
osu! version: 20170503.4