Yea as the title says, I can't join by opening the server list and clicking connect.
I've tried reinstalling and using both steam and non-steam version.
I can connect to servers by using the /jo command, but it's still rather annoying.

Try double click the server name on the list.

Right click the game> properties> then "verify integrity of game cache" that will install any missing files without downloading the entire game again.

tried both, doesn't work.

Pm Chintu, he had the same thing happen to him but he managed to fix it.
Or you could try downloading an older version from here:
http://forum.toribash.com/showthread.php?t=310132

Hope this helped!