Re: Strange, usually I check daily for the latest beta, but Aqua Mail Updated didn't find new version yesterday, but did today, see the screenshots timestamp.
So the updater just "lags behind" then?
There is a topic here somewhere about the updater -- started by its author, @PylerSM.
And this is the GitHub repo, suppose you can file an issue there:
https://github.com/pylerSM/AquaMailUpdaterPS - if Pyler tells me that there is something wrong with our version files, I'll fix (but these have not changed for at least 6 months).