WPMU DEV Dashboard 3.1 API key invalid

I can't activate WPMU DEV Dashboard.

The new WPMU DEV Dashboard 3.1 doesn't work (null data in all fields) when I upgrade directly from the previous version. For example, it doesn't know who I am, says I've been a subscribed since 1970 and is generally just "empty".

When I uninstall, delete & purge the WPMUDEV settings from the db, reinstall, and then try to activate my account it returns an error that my API key is invalid. If I upgrade I am never prompted to attempt activation.

This is pretty much the stuff from sitemeta that I removed:
select from wp_sitemeta where meta_key like '%wpmudev%';

Please help! I really want to try out the new features.