The stock behaviour for the SAS function in Kerbal Space Program is to remember what mode you had it set to last. If you had it set to point prograde the last time you disabled it, it will re-engage in prograde-hold mode when you hit the SAS button again.
Some people do not like this, and would rather it defaults to re-engaging in stability-assist (or attitude hold) mode. This mod adjusts stock behaviour to do just that.
It does not modify save files or game parts, so should not cause any corruption upon install or uninstall. I hope it proves useful!
NOTICE: As of 1.0, KSP has this behaviour in stock. This project page remains for people using earlier versions.