First of all, does the Extension's Splash Blurb in the FG Chat Box (on first starting FG) say v4.8.2 (and did you download the Extension from the first post of this Thread - and did you download the DOE:Base Extension for the fiorst Post of its Thread)?
Second, like the "standard" way of adding Records to Lists, you can either Click on the Edit List Button located to the bottom-right of the window, next to the Filter Box, or you can Right-Click in the window's list area and choose "Add" from the Radial Menu.
If neither of these two pieces of advice help you, please get back to us with full details: versions of FG, the Ruleset(s), DOE:Base, DOE:Locations, and other Extensions you are loading, and a perhaps a screen shot(s) of what it all looks like.
Cheers

