Same here, downloaded the software on a win10 laptop. Tried to login with the credentials from this site and after 3 times it said my account was temporarily locked. Then i tried a reset and it said my email is not known.
I created a new account and that worked perfectly. So user error. Any non beta user would probably not make that mistake.
Some comments about the signup screen:
All the dropdowns didn’t seem to work TABbing to them.
When in a drop down the arrow keys scroll your cursor out of pane. The highlighted item should always be in view.
In am in Spain but typing “SPA” got me to algeria. The typical Dropdown functionality is to allow for a quickly typed sequence to use the entire string for the match.