When trying to use the software? Did you do a recent update?
You can do the following:
Check the premissions on the Enfocus Preferences folder
- HD:Libraryreferences (on Mac)
- HD\Documents and Settings\All Users\Application Data\ (on Win)
Or remove the 'PitStop7' file (without extension) in the same folder and register the product once more when relaunching.
If that doesn't work, I advise you to contact Enfocus Support ([email protected]).