No worries at all, thank you very much for checking up on this when you can :).
I’ve tried converting a project to C++ (via the guide I ended up finding - A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums) and found how to add an empty class, but it had iTween compile errors with the plugin installed as just BP, and when installed with “C++ User or Both” option the plugin seemed to have not been installed at all (or at least it wasn’t available via blueprints and it didn’t show up in the installed plugins window).