In the My OSMC add-on go to updates section (the cloud icon) >backups and set a backup location that is somewhere other than on the device itself (ie a network path, SD card, or USB storage) and then exit the add-on and reboot (to work around a bug that I don’t know if a fix has been released yet) and then after rebooting go back to the same place and tell it to backup in the updates>manual controls section of the add-on. Once you have successfully made a backup of your setup then you can use the osmc installer (found following the download link at the top of this site) on a PC to make installed media on a thumb drive or similar (note that this will erase anything currently on the drive) and during the walkthrough of the installer app it will as you if you want to download a image or load one of your own and this is where you can select an older image. Once you have the media made then plug the drive into your Vero and reboot. The install should start on its own and eventually get you to the initial configuration screens you saw when you first received your device. Go ahead and set your location, device name, and the rest of it till you get back to the home screen. At this point go back into the My OSMC add-on at updates>manual controls and tell it to restore pointing it to your backup you made at the start.