I found that by downloading Pocket Express from the Sprint PowerDect home page and then installing it, the new program would over write my OnDemand program but not do anything with the TOuchFlow Cube that still listed "On Demand". It did however, make this inoperative. I had to use Pocket Express from the Programs file or make a shortcut.
I downloaded the new ROM update from HTC and it is great. It's got a full QWERTY keyboard plus lots of other improvements. Here is the link. Remember it's for Sprint customers!
HTC - Touch Phone, PDA Phone, Smartphone, Mobile Computer
Anyhow, I installed the Rom update, then ran ON Demand from my TOuchflo cube, and it said"On demand is replaced by Pocket Express". I chose the option and it installed Pocket Express and also updated my TOuchflo CUbe to Pocket Express instead on On Demend.
Hope this helps someone.