Thanks, Rudi.  I did have a ucac4.tdf file in my main Guide folder, but it was smaller than the one you referenced.  So I replaced it.  Even after rebooting, Guide still does not show the UCAC4 catalog for me when I toggle it "on".  Maybe it will be best to await the next version of Guide where UCAC4 will presumably be built in?  And, I understand there is already a UCAC5...

Wish we could all standardize on something.  For example, SIMBAD has very few cross-references to *any* of the UCAC catalogs, and even fewer standalone entries.

Thanks again,

Dave