I have just done a software update. Then tried to open Thunderbird by single click on Taskbar icon. Window stating Thunderbird already open. Weird.
Repeated with Firefox, same result.
I then did a Power Off, Restart.
Still Get same problem with Thunderbird and Firefox and more, see screenshot.
When I tried to view screenshot by clicking the file in my Downloads folder, a message then displayed at top of screen stating “Screenshot is ready” and Image Viewer icon was in Taskbar. i.e. the image did not open with Image Viewer when file double clicked as did before.
Has something in last Zorin software update today messed up the (Gnome) Desktop?
The only things I witnessed being added by todays update was something about initramfs tools etc.