Just to try to consolidate this all in one place, this is the set of problems that I originally thought were due to something I was doing. See Need help troubleshooting TiddlyDesktop version 15. My problems were with release 15 (starting with prerelease 4) but it is the same in release 16, which was produced to fix what turned out to be a different problem in release 15 reported by CaptainPackers (see Can't arrange tiddlydesktop wikilist)