How can I make copies of a toolpath to cut multiple versions of the same part?

Once you have setup a toolpath on one of the parts, double click on the toolpath name to open it for editing. Then select all the identical parts you want to toolpath and recalculate the toolpath. 

Additionally, some control systems allow a single toolpath to be cut multiple times. This is totally a function of the control system and you would need to contact your machine's manufacturer or control system's developer for specific information.