Just put it in, though noticed something odd.
My "daily driver" is CM10.1.2 in slot 1. I have "stock rom" in well, stock ROM.
I just downloaded 3.72 APK, and sideloaded it onto the Targa.
I ran the existing Safestrap and it says "Not installed"?
But I ran the "uninstall" any way, and it worked?!
So I deleted the app from launcher...
Then with filemanager, opened/installed the 3.72 APK, installed with no problems. Then "install recovery".
After that, STILL says "not installed"?
Boots to safestrap no problem. Verified everything is there.
Boot to system, ran Safestrap... It still states: "State: Not installed Safe System: Active"