ot get Popvideo 3 to completely remove the background.  Everything that disappears when I click on the Chromakey tab stays invisible with the exported output, and everything that I use the mask tool on is gone inside of PopVideo for the whole animation but shows up in the rendered output in two modes - Popvideo and Mov(ProRes).  In AVI mode I get the same video as I started (no checkerboard or blank parts). I am using the latest version of Popvideo 3.01.0411.1.  I am sure I am doing something wrong, but I have tried all the options I can see without success.  Please let me know what I am doing wrong.  I am using Windows 10 if that matters.

Thanks Jeff Thorne