As far as I know the add-on was made for build 3003 but it should work with later hotfixes.
The hotfixes will also update the add-ons if they are installed when the hotfix is run.
The latest hotfix for 15 is hotfix 4 - build 3898.
So if your add-on doesn't run then go to the HELP menu and check for updates.
Download the latest one and install it.
This will update your add-on too.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11