Using transparent video overlays in ManyCam?

I am professional audio engineer and, due to the pandemic situation, am helping out clients (FOC!) to help them stream some music events to gain some followers and raise their profile. I am working with a customer who has bought ManyCam studio for the year and we are looking to live stream a gig next weekend (24th May).

I have been using ECamm and OBS/SLOBS with other customers and I have been able to add transparent video overlays, with subtle animations of logos and other elements to help the streams look branded and more professional. However, I seem to be unable to do this with ManyCam. Can anyone offer some help please?