You use this program by importing your Collection from DVD Profiler via the XML Export function (DVD Profiler -> File -> Export Profile Database).
The you import it here.
The program distinguishes between profiles with an UPC/EAN and manual or DiscId profiles.
Once you enter the UPC/EAN of a profile in the text box it will be found and removed from the list. What remains are your missing DVDs.
Manual or DiscId profiles have to be removed by hand.
If you start the program with the parameter /skipversioncheck then it won't check if a new version is available for download.
It's highly unlikely that this program will do any damage to your computer. But you are still running it at your own risk, I can't be held accountable for any damage it causes.
Should the program behave erratically on startup, try to delete the following file: \Data\DVDInventorySettings.xml
You can find this program and other DVD Profiler related programs under http://doena-journal.net/en/dvd-profiler-tools