How to retrieve Dragon License Key From Registry
If you have a Dragon Medical that can't be launched and you need to retrieve the license key, you can get it from the registry at the following location;
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\9B224D5D679689E4D8FD6923BC15D5E7\InstallProperties
Note this was found on a DMPE2 install on Windows 10. It may differ but you can always do a registry search and look for A709A. That is the first 5 characters of a DMPE key.