If you run your Unreal scene in Embedded Mode within Aximmetry, you cannot use plugins that are not part of the base UE release.

However you can try to use the Live Link Mode, please read more on this here
https://aximmetry.com/wiki/index.php?title=How_to_install_and_work_with_the_Unreal_Engine_based_DE_edition#Interactive_editing 

Thanks so much! Will lok into it.