Andy,
This isn't about software, it's a mechanical problem.
Looking at the monitor screen, hands off the radio, it shows 96% on the throttle channel. You can pull the stick back so it reads 100% but most of the time it returns to 96%.
I took it back to the hobby shop I bought it from and had them look at it. They took it apart and adjusted something and now the stick won't stay at 100% (looking at the monitor screen) at the high end.
I much prefer this to having a high idle when landing or having the engine die when it occasionally sticks at 100%. I fly mostly glow.
bigbird