I can't find your old plugins, MrRay22, MrRay73, etc.

We had to remove those old plugins from the website because it's not easy to get them unlocked even having a registration key, since the system relied on the Windows Registry, and with the introduction of 64 bit systems the management of the Registry has changed and the registration utility wrote the information in the wrong place, resulting in the plugin never being unlocked despite having inserted the code correctly. To avoid confusion, we preferred to give up with that very old stuff (some of those plugins were released in 2003!).
After all, they can still be used even without a license code, they just show the nag screen once when they're opened.

If you happen to have a license code, you'd have to figure out how to add it to the registry to have the plugin activated.

For MrRay22 it should be:
HKEY_LOCAL_MACHINE\Software\MrRay VST Electric Piano\

There you should have two DWORD fields:
REGNAME={your user name}
REGCODE={your license code}