So I just installed the new version (I previously owned the old version and managed to jury-rig it to get it to work on my modern machine).

It installed OK, but when I get to the main menu, it's picking up some weird ghost input and scrolling madly through the game menu. I cannot control anything and have to open task manager just to even exit out of the game.

Any idea on what input it might be picking up?

Ugh it was a joystick. It must have been detecting something from my joystick or throttle and reading that as an up/down input.

I unplugged the joystick and now it's behaving normally.