@Anton_S Hello, Mr. Anton. I don't know when you will initiate the redevelopment of MSPhysics. As far as I know, countless people are looking forward to this project. Alternatively, you can develop a plugin that can partially implement certain functions.
For example, a simulation tool that can implement simulation functions similar to fusion360 and SolidWorks may not require embedding a physics engine (I'm not sure), but only adding axes and motors, as well as collision detection. Used for designing machinery, mechanical gif diagrams, and checking the rationality of mechanical design in sketchup. I hope to receive your reply.

Hello, I bought SUBD and have tried it for 2 days, countless times. Still can't activate. I'm in China and I've used VPN