After upgrade from openBH5.1 to 5.2 on my VU+ zero4k by using of the Backup&Image manager my box was not any more properly working. I downgraded again back to 5.1 /by using of the Backup manager/, but the system is again not correct working, an now even the Backup&Image manager is not any more properly working and I can´t make any image changes. I tried to upload fresh image 5.1 from USB /Fat32/ but the boot procedure /box switch off-on/ is not choosing the USB and is all time booting the problem image from the box. Is there a way how to install completly fersh image inb my box ?