Ouch

So the morale of the story is to delete old installations before the new ones enter service.
This is where a version control system would be very handy.
You remember the one that you were asking for the thumbs up from Peter Cordes (what happened to the guy anyway?) and ended up being put in the backburner?
Not only would it avoid embarassing stuffups like my one, but it would mean that people who download Gearhead II and dismiss it as an incomplete poopbucket might fire it up a year down the track and be blown away by what it has (or will) become.
I may not be a coder but a VCS gets the thumbs up from me.
Oh, and you will be setting a world record for the first Roguelike with an autoupdater.