On my Trisquel mini 5.5 machine I have a Desktop Preferences entry as the last item in the context menu when I right click on the desktop. Could you please try this on a test account freshly created for the purpose on your machine. It may be the local config of the particular userid has become damaged.
On my Trisquel mini 5.5 machine I have a Desktop Preferences entry as the last item in the context menu when I right click on the desktop. Could you please try this on a test account freshly created for the purpose on your machine. It may be the local config of the particular userid has become damaged.