The 40FINGERS DNN Mass Manipualte Module was initially built years ago, when we needed a way to perform some advanced maintenance tasks on a few DNN installations. Over the years we kept adding functionality to it, chaged the working a bit, and made the module extensible in a way that it's possible to create and add your own functionality to it.
Let's just start this introduction by repeating the warning message that's also in the module:
If there's something unlcear in this manual or if you find a typeo, please us know: https://github.com/40fingers/Mass-Manipulate.