I tested the JAR file under Linux and Windows successfully. Maybe there are some side effects with the Java version.

Regarding a plugin: Just from looking into the source code I don't think that it is possible to implement it as a plugin.

How can I use your Version?
I can't find a final setup, or a jar file in your github archiv.

I use the electrical symbols for my drawing, but it actually in my version it is not possible to lock the layer and to have a nice coloring for the symbols.





I need your help. Please!