Do Your Data Recovery 7.8 Pro adds the program's folder & files, a registry key for the app and one for uninstall. Once activated it will run in another copy of Windows and remain activated. The only files added in that case are for Edge Web View, though the registry took a huge hit in my Win10 VM, with ~425k new entries.
Is it any good? I hope to never find out, but am hanging onto it just in case.