The latest Plus! for Skype just starts the video for any application requesting Plus! Virtual Camera instead of providing Plus! static logo image. That's only it!
Therefore, I do not recommend you to revert back as other webcam applications on your computer, "may see" a Black screen without video.
We put lot of efforts to improve the webcam feature. When we get feedback and suggestions from you, Plus! community, we try to implement as much as we can in a reasonable time frame.
Have a good one!