If you go to Help, it will list the places searched. Any found in those places should be listed. Tooltips will display their paths, and you can control-click to reveal them in the Finder.
I just now noticed that only one of the libraries from the Script Libraries Pack application is appearing in that list. (MyriadTables).
I confirm that SQLite Lib2 and BridgePlus are installed and available. But since they’re in the pack I guess the only way to see their dictionaries is open the contents and drag and drop from inside the app onto the SD Icon, then add as favorites?
That worked, but I think that part of the dictionaries window needs work.
That said, I can tell you that’s a pretty handy feature. I had written a script in the script menu to chose a library to open from a list, but this is much smoother.