Normally, what I would do when I get an update for an portable application is that I'd run 7-Zip, go to the app directory and create a backup zip of said portable application before I update the app. This has saved me multiple times whenever I need to downgrade the app for whatever reason.
I'd like for my process to be automated though, built into the Updater app, maybe as an opt-in option in the Advanced tab.
Thanks.