Trackmania Stadium on Steam wont work?

[RiseInTheWake]

A long time ago, cant remember exactly but its been atleast 4 years, i downloaded trackmania stadium on steam. I recently reinstalled it on a new pc and now i can't play. whenever i load up, it shows schedules with two games and i just want to stadium, not the others. Idk how to fix this or change it, and whenever I log in it shows "this key is already used" that may have something to do with it, but IDK. Could i get help on this? THX.

[TMarc]

There was a change in the player profiles some time ago.
This means you need to login at the website to migrate the profile to "maniaplanet v4".

Go here: https://www.maniaplanet.com/login

And then, after starting the game in Steam, use the same Maniaplanet account to log in.