And obviously doesn't return. The only way to remedy this is to reboot the PC entirely. Utterly ridiculous. The cursor shows in all other applications save for TS Classic. How to remedy this without reinstalling the whole game.
"And obviously doesn't return" Why is it obvious? Maybe it is something to do with your settings rather than the game If it was a problem with TSC then it would affect everyone instead of just yourself And CONTACT SUPPORT https://forums.dovetailgames.com/threads/reporting-a-technical-issue.31193/
I can't check the exact paths in the Windows registry right now, but if you ever used a freetrack/trackir, you need to delete or rename a single registry key, where there is stored the path to the trackir exectuable file from HKEY_CURRENT_USER. This key will be recreated the next time you will launch the freetrack/trackir software, so don't worry about deleting it. EDIT: I guess it's this registry key to delete: HKEY_CURRENT_USER\Software\NaturalPoint\NATURALPOINT
I have this too and I have never used headtracking. You don't have to reboot the PC, you can Alt-Tab out of the game and shut it down via Task Manager.