Manually changing shared_prefs and forcing app to update to it?

I've been trying to figure out if it's possible to disable/enable GO SMS popup notifications via something like Tasker. I came across the following line in /data/data/com.jb.gosms/shared_prefs/com.jb.gosms_preferences.xml: It would seem that I could just flip that to false, but GO SMS doesn't see that (and it actually rewrites the shared_prefs file it looks like). Is there a way to force GO SMS to re-read this shared_prefs file? I am rooted and am pretty comfortable with shell commands as well as Tasker; I would think that any solution would require one of the above. (Tasker can fire Activities or broadcast intents.)