I installed DF19A5 on the box, that could connect.

I copied the entire workspace local to the client, Leaving the \df\19.0\folder on the server, that worked.

I removed all the local folders except Programs, and fixed Config.WS, that worked.

IDK why, but running the app across this network segment gave it the heebie jeebies. I've left it running as a local copy, pointing to shared bitmaps, reports, data.

Beats me. I'll leave it as this.