If dslrBooth does not appear to open or seems like it's open when you hover your mouse across the screen but you can't see the application's main window, then you have an issue with your graphics card drivers.
We have seen this issue once before and it was caused by an issue with the graphics card drivers and the latest windows update. Try to update your graphics card drivers from the manufacturer's site. Please see: Graphics Driver Troubleshooting Steps.
If you still have issues, open Notepad, then open the file under:
Change "HardwareAcceleration" to be false instead of true.
Save the file.