Anything that I set out to install, I "read the ___ manual." If, in the course of trying to doing something else, such as say, play Skyrim, I am prompted to update the mod manager, I assume that this is intended for the betterment of my gaming experience, and if it might be necessary or advisable for me to read something or do anything else before proceeding, the update notice should warn me of this since it is only reasonable for me to trust that the makers of NMM (or any program) are not going to push a program change that is going to screw up my game. I doubt that anything that I read ahead of time would have warned me of the danger of the update not finding a file, then ending without fixing the mess it creates.