How is Workflow Import supposed to work?

I’ve installed MDS on a desktop system and attempting to import the work I did while remote onsite at a client’s office so that I can centralize my MDS configs. I click on the “Import” button in the main MDS screen and traverse the external MDS stick I built elsewhere but nothing appears to be, for lack of a better description, importable.

Apologies if I didnt RTFM some place. any help greatly appreciated.

You import files that you have previously exported. Did you export workflows previously?