Hey, hope you are fine today.
It´s easy to edit the .json files, just extract it in desktop in a new folder, edit ´em all, and then just drag and drop it on the zip, leave all options of WinRAR default, click on OK or Accept, and then check for modified date, and you´re good to go.
All the files that doesn´t have an (*) asterisk like "example.obj" and not like "example.obj*" are editable by this method