@Gargron I'm not a lawyer but I don't think the ship has sailed. You still hold the rights as the creator of the project, but if you do do not assert them it would dilute your branding. It all depends on jurisdiction as well. Consulting a lawyer would be your best bet.

On the other hand, you don't want to burn your goodwill with your community either and choosing to enforce your naming rights may be seen in a bad light. You can probably get free advice from folks in the community though.