If I press on the "extended tags" icon in the main toolbar, I can see "catalognumber" for many of the files I've edited previously.
I am at a loss though as to how to get this to display in the tag panel. The field "catalognumber" does not appear in any of the fields that can be added there.
I did have this working properly at one time but am not sure how I did it. I unfortunately had to reinstall the software from scratch so I lost that.
Would someone please steer me in the right direction.
Your post made be realize that I've forgot to add CATALOGNUMBER to the list of default tag fields for new installations — I'll add this with the next release.