I deleted a folder in a project and it keeps recreating it

Hi everybody,

I deleted a folder in one of my projects, as it was not necessary anymore and was not containing anything useful, and when I open the project it keeps recreating it, and it tells me that I should delete it properly from the Project Manger.

I tried to do that, however there is no possibility to delete that folder from the Project Manger as the Delete option is not active as I make a right-click on it.

Any ideas?

Thank you very much.