Need to change something on template, cannot find it

Hello, someone put in a custom template for this course and now I need to change one part of it. I cannot find where the templates are stored, it does not seem to be accessible from the top of the Title Explorer where the "universal commands" and stuff are.

Where is this template actually stored inside the PC, so can open it up in Photoshop and change something on it and then save it?

Thanks