Just purely out of curiosity, does the modification work by replacing the original "core" app files, or is it like a "patch" that goes over the original files every time you open the app?
By coincidence, I noticed that the original colors is still "remembered" by the phone. What happens was, my phone had critically low battery so it was running a little slower. Normally when I open SMemo, the new Grayed out colors are there. But this time when I opened it, it lagged very very slightly, and for half a second, I could see the original colors with brown and everything. Then after that half second, it changed to gray and everything was normal.
So I was just curious, I thought mods actually replace the app files, or is it like a patch? I always thought the former because they say "mod changes are irreversible so make a backup".