I just installed the latest beta build, 29, and it logged me out of the app. I opened the beta and saw a message saying that because I have a free account I can only acces Throttle via the web. I've never seen this message with previous builds.
I tapped 'ok' and was forced into the walkthrough screens. After that I'm not able to log in. I'm shown the login screen but it doesn't accept my credentials anymore.