Its not so easy to find the right key to edit the file association.
Rhino 4 has a \shell\open\command key with a path to Rhino4.exe.
Rhino 5 has just a \shell\open\ key with a friendlyname value but no command.
Its not so easy to find the right key to edit the file association.
Rhino 4 has a \shell\open\command key with a path to Rhino4.exe.
Rhino 5 has just a \shell\open\ key with a friendlyname value but no command.