I foolishly installed all (eleven, I think) theme plugins available in the Moodle plugins database for Moodle 4.5 in my new MoodleBox.
It froze with a blank screen.
I could not uninstall any of them.
I could not get into the MoodleBox Administration page with any admin account (blank screen).
I removed the microSD, put it in a USB, plug it in a PC running a Linux virtualbox, examined it, and tried to find the 'themes' folder, and failed.
I had to re-format the microSD and re-install the MoodleBox.
But I wonder if anyone actually uses any additional (third party) theme plugin in a MoodleBox.
Can someone please tell me how to delete an unwanted plugin from the microSD?