No, I tried that; maybe the issue is the actual model. But could there be something in Sketchup I have to adjust or change for the plugin to properly work?

I've started to use the Sketchup to manipulate 3d models, but for a lot of them I get a message saying that I need to get SketchyPhysics3 RC1. I've tried downloading multiple plugins and versions, but the issue remains the same, and the models don't have a control panel that I need to manipulate the figures. I'm really new to the program, so any help would be appreciated.
Thanks in Advance,
Jack