This is occurring for me on focal with 3.36.1-0ubuntu0.20.04.0. It seems to affect all deb packages.
** Attachment added: "Screenshot from 2020-09-22 10-29-58.png" https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1662430/+attachment/5413202/+files/Screenshot%20from%202020-09-22%2010-29-58.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1662430 Title: GNOME Software doesn't offer to update a .deb if it's already installed Status in gnome-software package in Ubuntu: Triaged Bug description: Dear all, Sometimes I do the following: 1. I download a new .deb package that provides an updated version of a package 2. I open this package with Ubuntu Software 3.20. 3. However, it only shows me "Remove" or "Launch" but not "Upgrade" 4. I can still correctly and properly upgrade the software in question from the terminal Please see the attached GIF as an example. The package I was trying to upgrade was this one: https://github.com/slgobinath/SafeEyes/releases Yours, Robert To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1662430/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp