That's actually the first thing I tried (after switching to another keyboard, I can kill the process)
Th xt9 turns it self back on
(am currently on a cyanogen mod rom, if it makes any difference, but can hardly see how that would affect the behaviour...)
Am I downloading the right beta package?
The beta should be right... and I use CM too
Can you backup your keyboard settings when the T9 key is off and send me your file /sdcard/smartkeyboardpro/backup.zip by mail?
So indeed I don't see the T9 state saved in the preference file...
I can see 2 explanations:
1) you don't use the right version (try with the official 3.7.0, it will be out soon)
2) there was a problem when you disabled the XT9 button. In which app did you disable it first after reboot?