Hi @ClassDendrogram ,
the .jmpaddin file is just a zipped file with all of the files neede by the addin.
If you have chosen to reference additional files, that will probably not be updated automatically, depending on JMP Version.
Which JMP Version are you using?
How did you generate your AddIn, by JMP Addin Builder? Create Add-Ins with the JMP Add-In Builder
When you added a script in Addin Builder as a file (in JMP <= version 18), you need to add it again, to make the change effective.
This may have changed in JMP 19, but I did not test so far.
Georg