If your HDR is in standby, a hidden scheduled event wakes it to update. Disable-ota removes that event, and a HDR in standby will not wake to update.I only had the original Disable OTA package enabled and it stopped my box upgrading, why does the new version add a reminder to the schedule?
However a HDR that is on, and hasn't been rebooted recently, may still update. The addition of a watch (or record) timer event inhibits the update even when the HDR is already on at the scheduled update time.