I believe you only have a,limited time, but if you click on thread tools, upper right, then on edit, that's where you can also edit the title. If it's after the time limit, which, sorry, I don't know how long you have, I think half an hour, then just pm a mod and they can edit it for you. This is how it works for me, but being a mod, I may have different options showing then someone who isn't a mod has. So, if you would please, let me know if the edit option shows for,you in the thread tools.
I think us moderators have a different screen than regular members have. But on the Forum page, when you have "new posts" up on the screen, do you have a little "edit" over to the right of the subject of a thread? If yes, then you click on that and you can edit the subject title. If no, I don't know the answer for you. Except that any one of us modes will be happy to fix any titles for you. Just go to the Forum page and see which moderators are online at the moment, then send us a private conversation request.