Demo mode

Running 2.79 but for the life of me cant get demo mode to work. Installed it from addons, tried from file alone command and it says “no configuration found”, yet its there when I look at the runs files. Tried to search Youtube and other sites for an answer - there is nothing out there. Can someone help me?
thanks
Geoff

Have a look at the add-on’s documentation. It hasn’t been migrated to the official manual yet, so it’s in a somewhat hidden place on the wiki.