It works fine in AA23.0.2. I just tested it.
It's only a little SWF panel with a couple of JSFL scripts.
Grab the ZIP from here:
https://drive.google.com/file/d/1UaaHCq2LLOtXIvlUFTfYb_crm88P93bj/view?usp=drive_link
Unzip and put all the files into the WindowSWF folder which is located inside Config.
Do this while Animate is closed.
Config is here:
Win:
C:\Users\YourUserName\AppData\Local\Adobe\Animate YourVersion\YourLocale\Configuration
Mac:
HD\Users\YourUserName\Library\Application Support\Adobe\Animate YourVersion\YourLocale\Configuration
Should look like this:

Start Animate and open Boiler from Window > Extensions
