Paragon Drive Copy 14 Compact (English) Build number: Can't open app to see. When I try to open the app, I get an error that the path to launcher.exe does not exist. I follow the path and the files do actually exist. Not sure whats going on. I tried to reinstall and I get "Fatal error: key is invalid". I see no way to put my Product key or Serial number. How can I fix this problem?