Shift 2 Unleashed activation limit

I purschased Shift 2 Unleashed on Steam in July 2016 as part of the EA Racing Pack. Over the past nine years, I have occasionally downloaded, played and uninstalled the game.

Recently, when attempting to launch the game, I received a message stating that I have reached my activation limit. As a result, I am currently unable to play.

Unfortunately, the PC's on which I previously played the game are no longer functional, so I'm unable to deactiavte those installations to regain my activation slots.

Could you please advise me on how to resolve this issue or reset my activation limit? 

Thank you for your assistance.

Kind regards.