There is the instruction below how to re-upload samples and hardware.

Go to: C:\Users\UserName\AppData\Roaming\Autodesk\Autodesk Fusion 360\API\AddIns\JoinerCAD v2.X.X\Settings

Delete JoinerCAD.settings file. When you will start Fusion and enter to JoinerCAD environment, you will be prompted with the question: "would you like to to upload samples and hardware elements?" If you will click Yes, please be patient, because then we will extract and upload all files (during this, Fusion may become Not Responding, because upload mechanisms are slow and we are trying to upload many files..).