I will dig around for signs of interest, but they may not be too motivated. NP++ has had a functionality equal to the jump-lists for quite a while. Rather than remembering what it has opened lately, you just close the app the documents are not really closed. When the app re-opens, it restores tabs for all documents that were not explicitly closed in the last session. Somewhat like the session-saving tools in web browsers. It seems likely that there are other apps that are not integrated with the new features though.
It would be nice to have consistency of function, but it may be a while as the jump-list function is not as simple as associating an extension with an app. My primary interest is more understanding of how the jump-lists work, as this looks like an interesting area.
and now NP++ is working! Notepad started updating its jumplist right after I did your "Reset" process, but maybe NP++ needed a Windows shutdown/re-start?
The Jumplist feature gets more interesting as I get into it. It is different enough to be confusing as to what it is really doing, like: are the files in the hidden folders really "there" or is it just a junction/symlink? Or, at what part of the file "opening" does a does a document get added to the list? But the ability to, say, store a specific search (e.g. "date modified yesterday") is very promising. May cause me to re-think my whole way of finding my stuff.