A) I have two releases of my mod, one for nightly and one for 1.0. I updated this morning the nightly branch, so it is quite fresh. If you update your game and use my outdated .exe, your game will be outdated.
B) If you replace my .exe with a new one, it will be as if you're not playing with my mod anymore (the save files however will not delete any information, so you can come back to it later, or even wait for an update). You can also turn my mod off as any other mod but keep my .exe, and the stat tracking code will continue to work and be displayed; you simply wouldn't get any commendations for them.
Hope you like it!