You're right, I was on 1.6. I looked for the latest and thought that was it. I still get the same thing. It should be pointed at the same folder that my xml is in, right? I have that path correct (Pinballx/databases/VPX). Also from running this, it looks like it's geared towards videos, not screengrabs. I don't do video's on my cab. I only have screenshots.
Also, in other systems, when I change it to Visual Pinball from Custom .exe, Pinball X hangs. If I click the playfield (focus) then I have to CNTR/ALT/DEL to exit. When I exit that way, my taskbar is missing and I have to reboot to get it back.