My Q is where did you get the info that the SPC code gets changed? And if flashing made the device not able to be flashed again, then many of us would be oh so screwed.
As for how to close apps, like said before I use Resco and here are some screens to show you what I mean.
![](http://pic30.picturetrail.com/VOL1490/7569542/17537011/314006406.jpg)