Last night I found this item https://www.maketecheasier.com/ubuntu-software-center-not-working-fixes/
I first tried:
sudo apt clean
sudo apt update
No change resulted.
sudo apt-get update && sudo apt-get upgrade
Reboot for good measure.
Opened Software Store and it looked same again for the “All” software tab.
But then noticed the down arrow under Categories list. That expanded the list to include Utilities. I then found “Windows App Support” listed in that category, correctly showing ticked as installed. Bit more comfortable with that.
Opening the “Installed” software tab. I do not see “Windows App Support”, only the components “Play on Linux” and “Winetricks” are listed. Looking back at my screenshots I use as record my installed app’s, that is the same.
So it is all there. Just have to remember now to search for “zorin windows app” not “windows app support” or even “zorin windows app support” in Software Store. How weird is that!
I still don’t know why @carmar can search for “windows app support” and I cannot.
Long live Synaptic is all I can say. On there it is listed as “zorin-windows-app-support”