Replace Drawing Template (Title Block)?

We had a vendor prepare a drawing package. He customized the drawing templates and the title block is all wrong. What is the easiest way to delete the wrong template and replace it with the correct one?

I tried using Sheet Properties but that is looking for .slddrt. The templates are drwdot and that is what I need to fix.

So, what do I need to do to fix this?

Thank you,

Brent

SolidworksDrawings And Detailing