Thanks for the kind words!
If I’m not mistaken, the plugin works without issue with 4.1, it’s just that the engine.json file needs updating so you get a warning in the app.
I’ll take a look this evening to make sure though :)
Okay, I've tested it and reviewed the code and there's nothing stopping you from using it with v4 versions above 4.0.2. You will see the following warning, but it won't stop the plugin or the engine from compiling and it works as expected:
Plugin "crawler" was created for an older version of GB Studio and may not work correctly. Plugin uses engine "4.0.2-e0" but GB Studio is using engine ...
Once the new version finally comes out, I'll probably have to do some refactoring, but for now it's compatible :D