Ahruman, may I draw your attention to the screenshot below that I stumbled across when I just fired the game up without double-clicking directly on my test commander?
Before that I didn't really notice that the menu simply wasn't there.
A short look into the OXP (should have done that first, sorry) reveals that in requires.plist max_version is set to 1.69.1. Is that intentionally so? Does anything bad happen when I set it to 1.69.1.1?
The currently available version of Debug Menu.oxp should work with 1.69–1.69.1.2 (Mac OS X only) with suitable manipulation of requires.plist. I’ve uploaded a fixed version.