Hopefully somebody can give me some guidance.  I was building screens (1024x768) in Screen 4.  I had been testing it in Mach every hour or so to make sure everything was there and functioning.  Then I opened my screen set with 1280 x1024 (which is the final goal) in screen 4 and saved it, then went to Mach to load it, and all of the images, buttons, LEDs were shifted down 280 pixels.  I had read in previous posts that there have been difficulties when using a screen resolution that you can't see, so I went back into Screen4, opened it at 1024x768, and now it comes up with an error box: "Unexpected file format". 

Is there anyway to recover the lost screens?