Well, looks like the Beta has fixed the problem for me!!! Woo Hoo!!!
Made a change on the laptop (Win7), Dropbox updated, Android Phone did not catch updated sync, but a manual sync did get the updated file. I may not have waited long enough? Desktop app (Win10) did get the updated information automatically, but Tools > Sync indicated Error 118 even though the data was updated as far as I could tell. Android tablet did update by itself.
I made another change to the file on my Win 19 Desktop. Dropbox updated, Android Phone updated, Android tablet updated and the Win7 laptop updated, all automatically.
I will try making other changes in different orders to see how it performs, but at this time I am cautiously optimistic.
Thanks you Anshu kumar and the Enpass team. I left feedback on the Beta site.