@Pirati,
If I was you, I would make an appointment (They do take walk ins as well but you might have to wait a while) at Watertown RMV and see the guy who's in the very far left at the counter. Pls make sure you have your expired or unexpired work permit with you. That will do the magic. Good luck


P.S, I think his name is Luis( he is very familiar with the situation)