Just tried logging in, didn't get any indication in game that it had logged in and it just froze. I had to alt tab to see the 'error' dialogue stating login completed.
I couldn't then get back in to TPA and had to kill the process from task manager.
Here's a temporary workaround in fullscreen mode:
After you Login, wait a few seconds, then press Enter again. Should take you back to the main menu.
I'm working on switching it to use all in game dialogs. Also planning to have it save your login so after you login the first time it'll log you in automatically any time after that.