Using the latest version, 1.2.1 and the latest LEAP drivers (as far as I can tell). GECO works fine, it's seeing my inputs and producing MIDI as it should. It loads the last document on startup just fine. I can also use Open Recent.
But I can't Open or "Save As" my settings. It simply crashes (see screenshot). So it's pretty unusable at this point.
I suppose I could reverse-engineer the .geco format (fortunately it's just XML) but the GUI is much better!
Machine is Windows 7 64-bit with 8GB RAM, 6-core i7 @ 2.2 Ghz (An Alienware M14x if you want the specific model).
I tried uninstalling/reinstalling through Airspace, no change.