I just noticed this update to the Capture app (15th November), and now all my previous captures have disappeared!!! In the words of Beavis & Butthead, "that sux". I want my old captures back and accessible within the Capture app 😠.
Edit: I can still see my old captures in the Hyperscape Preview app, but that app has no option to edit or delete my captures like the Capture app does, so I now have no way to delete any of my captures made before 15th November when the Capture app was updated 😠.
Update: I've just found that Hyperscape Preview now has a delete icon in the lower right corner of each capture. I'm certain that wasn't there when I looked earlier. That's an improvement, but there is still no option to edit the names etc of these old captures. It would also be nice if we could have a tab in the Hyperscape Capture app that would show the old (non-Horizon Worlds) captures, or a way to convert them into the newer Worlds format, so that I won't have to redo all my captures.