Thanks for the reply and the help method Billbee. It didn't work unfortunately, I just keep getting the error code display. The only thing that works is safe mode B but then again nothing seems to work in that either. it just does it's SRAM test which passes and that's it. I certainly think it is Line 6's fault! I was using their software in a method that should be harmless to the hardware and the result is I get a fault which prevents me from using the product. Rolling back and re-updating shouldn't be a problem, especially as the Flash versions are all still available on the Line 6 site and there is absolutely no warning of this possibly happening anywhere so I fail to see how it's my fault for doing something which should result in not one but two broken products. The very fact that you are weary of Flash updates says a lot about confidence in their software.
It was the fact that it happened twice that made me realise that there was something wrong with the updating process that is causing this as before with my bean I just assumed a part of the hardware had went dodgy. I'm out of options now as I've done everything I can think of. A shame as I was getting some real nice tones!