Right i tried it on UE4 4.20 / 4.21. Installs fine.
I can view animations and all in single node its fine, I can even use it in game.
Since we going in circles here, Its nothing to do with the function of the plugin as it works fine.
Its choosing an animation and problem is swapping to another animation in drop down.
I click on another animation but it just does not change, I tried it on new clean project and same thing.
I uninstalled the plugin from epic games and reinstalled it again.
Its the drop down box that does not change animation.
The only thing i gotta do is to remove animation and add animation and choose another one this way.
Can you try it out matt and tell me what happens when you try and change animation.
Check photo below
Add able file, Add task, Play animation, Pick an Animation. Highlight the animation bar.
Click task propertys then under animation pick a new one from dropdown.
Please tell me if it changes at your end.
I am using 4.20/4.21 and both clean projects.