Hiya, fresh install complete and no issues were encountered, played fine last night. That was until now, and the exact same issue has happened again.
Really not sure what on earth to do at this point.

F12:

Improved support for the new "unlock code" (replacement for old GAME password)
- Correctly named field (for unlock code) in unlock screen
- EYE button beside the unlock code (see what you have entered)
- Informative message if your unlock code is not 20 characters
- Automatic exit from unlock screen after successful unlock message

F13:

Improved support for the new "unlock code" (replacement for old GAME password)
- removed the EYE button - the unlock code is visible when you enter a new code
- error messages if there is any problem getting text from the clipboard
- 11 translations updated - thank you translators!