The vortexbox image zip is not recognised as bootable: https://wiki.vortexbox.org/available_images#vortexbox_25_beta_image
Though the page says: “This image can be used to build a new VortexBox or recover an old one. It can be installed on boot media of 8GB< in size. The zip file can be used to make a bootable USB installation key”
Any advice appreciated.