I converted my key to Steam. Now my steam client is having issues. Can I convert my access key back so I can try the launcher? Thanks!
Afaik no you can't it is a one way thing. Converting to steam means that you are now depending on steam.
iirc that is not true. When you converted key to steam you still can play it through normal launcher.
I am almost positive I have read that if your UberNet and Steam accounts are properly linked you can use both Steam and Uber launcher.
As DeadStretch said you still can use Uber launcher for updates. If you can run game though Steam for some reason you need to open this link: https://uberent.com/user/linksteam And link your accounts manually, then you can play though launcher again.