After a software update tonight my install was no longer able to boot into the desktop. I was able to fix this by reinstalling gnome-session, gnome-shell, and gdm3.
Upon getting back onto the desktop everything looks exactly as I left it and runs correctly, but some of the Pro features of Zorin 16 are now missing, such as the extra layout options under Zorin Appearance. It also prompts me to upgrade when I visit the layout tab.
I've reinstalled zorin-appearance and zorin-appearance-layouts-support but that just leaves me with the standard options.
Is there a way to get these options back without a full reinstall from USB?