STAAD Error when trying to Update ISM Repository


I am trying to "Update ISM Repository". As a summary, I used an ".ism.dgn" file to create my STAAD model and now that I have done my analysis and design I want to update the existing repository.

I have the latest version of STAAD and Structural Synchronizer.

When the ISM repository window opens I get this error (see below).

Where is this file even created? How do I create this file?