Arafaxx

so basically I bought this software when it was in the version 10.xx (cant remember it) and now its in 11.45. I recently got a new pc and forgot about this software and only just realised I have it so I downloaded it and tried to register my key and it said this key was for a older version even though I thought it would work forever. Is there a way to downgrade to a older version or can someone make my key work file:///C:/Users/44776/Downloads/why man.png