Every time you sync, Newton Connection updates a work file stored in your Application Support/Newton Connection folder. The work file contains the current state of the Newton device. There is a work file for each Newton device you connect to, named with the device’s serial number.
If you want to save the state of your Newton device at a particular point, you can copy the work file into another folder for safe keeping. Then at a later date you can copy that work file back again and next time you sync or restore, your Newton device will be returned to that state.