The latest version update contains some changes to avoid the performance/FPS slowdown in the first version.
The clothing has had sim disabled to help FPS and stays on(removed the 'loosen' clothes options). I'm asking on the forum if there is a way to toggle clothes on/off because I don't know how to do this within the scene other than using the editor.
There is only one voice used - I removed the voice options as the underlying system was also causing a performance hit.
On a different note, I made the alpha and scale slider controls apply to the auto-dildo as well as ball.