I was trying to get around the Close Window action not working by using Alt-F4 key combination. Different crash than the usual Enter Keystrokes crash.
@FunkyBunhcesOfOats looks like this error has been fixed for the next release, but just in case could you send these logs to have a look:
They should be in the Studio folder: C:\RPAExpress\Studio
Those logs are not in that folder.
@FunkyBunhcesOfOats the issue with the keystrokes action has been fixed.