Good to know I'm not the only one. Everything's now working fine w/ the -32bit switch. I took the opportunity to restart the game from the beginning on a higher difficulty level.
And for the record:
https://support.steampowered.com/kb_article.php?ref=7422-RYFZ-0595
Cheers, y'all.
I'll try that, thanks. I've googled around quite a bit, seeking a solution (hence my use of ai_disable), and yes, I've seen that most folks who report this are pirates. That's not a happy-making thing.
Interestingly, the 32-bit version offered the Shift-Tab "Access the Steam Community while...
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