I found that if I set under misc to use live preview mode this problem goes away and channel switching is much faster.
If live preview mode is off, then channel switching takes a very long time like around 30 seconds. and hitting the plus key drops me to the main menu where you have the scrolling options
I set live preview off, loaded channel 3.1 and then hit the plus key, it dropped me to the main menu after a while. The wait is long enough that you wonder what is going on. Then I x'd out of gbpvr and zipped these up for you.