Hmm.... I can't remember!
None in the applications folder But:
in the Finder, Apple - Recent items, gives Affinity Designer, two versions apparently identical. Clicking on the top one opens AfD 1.6.1, and on the second one, version 1.5.5
Sorry everyone, I withheld a possible clue; version 1.5.5. is in the applications folder on my other partition. As indeed is Version 1.5.1, but I copied that one from my older Mac rather than downloaded it.