Description of problem: I removed Unetbootin, not only was Unetbootin removed but it could not longer be found in gnome-software. I installed Unetbootin through gnome-software. Version-Release number of selected component (if applicable): 3.18.3 How reproducible:Not sure Steps to Reproduce: 1.Search for Unetbootin in gnome-software 2.Install Unetbootin through gnome-software 3.Remove Unetbootin through gnome-software 4.Search for Unetbootin through gnome-software Actual results: After being removed Unetbootin can no longer be found in gnome-software, even after a reboot of the system. It looks like it's appdata is gone with it's removal as well. Expected results: Unetbootin should not be removed from the gnome-software lists after being uninstalled if it is was initially present there, which in this case it was. Additional info: I have not tested if the same thing happens when removing other apps that were initially installed with gnome-software. Also the gnome-software lists seem to change whenever where there is a new version of Fedora installed and the selection of apps in gnome-software is very limited compared to Yumex for example.
Are you sure you installed Unetbootin from gnome-software? Unetbootin does not have an AppData file and as such is not installable in the software center. Either upstream needs to add the file, or downstream can patch this in the srpm. See http://people.freedesktop.org/~hughsient/appdata/ for details.
Some installed packages from other software centers like yumex sometimes appear in the software center as installed. Even though their appdata is not there.