Well, a small update. Not quite sure what is happening with the little box but it comes on at 1am, even though I have nothing programmed to download at this time. I've switched ABM to download weekly at 5am, and have the EPG downloading at 5am as well. I have a Power Timer to switch the box off and I've also amended the HDMI CEC so that it comes on with 'source request' only.

The EPG download freezes for me about 25% of the time. It gets part the way through 'parsing events' and then nothing. The screen is on, but the remote is unresponive. The only thing to do is switch it off at the back. Does anyone else have this issue? It's such a shame that I had to re-install Openvix after it crashed - I didn't have any of these issues prior to this.