PBE Client not working

Hey Guys,

I was wondering if someone could help me. I've installed the PBE Client a few days ago and it worked perfectly for a whole evening. However, when I wanted to launch the game the next day it won't work. There's a 'loading sign' next to the mouse cursor, it launches for a couple of seconds, disappears and nothing else happens. I've already reinstalled the game: into the same folder, into a different one, on a desktop; I've tried flushdns etc. in cmd; everything I could find online but nothing seems to work. If there's anyone that could help, I'd appreciate it a lot.

Thanks!