How can i change my reg key of sof

i have a problem,i wana change the reg key of sof becuase now i cant play it online because i had the wrong key now i have the right key but cant change it anymore.
[reinstalling doesnt help!]

Hit: start/command type: regedit hit enter.
Your registry editor starts.

Goto HKEY_CURRENT_USER/software and search the Raven folder! Delete this one! (you can also check in HKEY_LOCAL_MACHINE/software for the same folder, but I don’t think it’s there!)

Now, if everything went well, it asks for a key on startup!

Good luck!