Starting with v0.4, each of the .celx scripts contains only a Cel://URL
It takes you to specific viewpoint and configures Celestia's Rendering options to make things visible. Those scripts do nothing else. If you see the map after using its Goto script, then the script is working as designed.
The Addon does nothing whatsoever which would stop time. In fact, the URLs are supposed to set the time to be "Real time". (That's what they do under Windows and Linux, anyhow.) If your Celestia's time is stopped, that would explain why the Addon is not working. Please do whatever is necessary to make time progress and see if that fixes the problem. I'll investigate other ways of taking the viewpoint to the maps besides URLs.
Celestia's complaint about not finding a lores texture is standard when there's no lores directory.
There are dots in the planet names for the "popout" system to distinguish that tiny planetary system from the "real" system. The real system is visible if you use its .celx script. It uses names without the dots.