3rd-party entries are under the path \HKEY_USERS\[*SID*]_Classes\CLSID\[*ApplicationHash*]. If you're the only user logged on (entries only exist for active users not logged out), your SID (or Security Identifier) will be obvious because there will only be one. It is the long one. Otherwise obtain your user by using the Command Prompt statement wmic useraccount get name,sid.