Mod Updater is NOT a mod but an application. It is really cool tool and makes updating your mods so easy! No more downloading each one separately, unzipping them and putting them in your game. This application does it for you!
Created by Tuckwik it can be found on Nraas.
For more information, how to download, install and run go here
I have downloaded and installed this tool, tried it out and just to be on the safe side, ticked all the mods I have and where detected by this gem, and clicked Update. Now for sure all my mods are completely updated to the current level.
However, if one or more of your mods are in the Testing Phase, it will update it to the current level not the level it is being tested at.
Always check with nraas to see if your mods have been put back in the testing phase or taken out.