RegApp IDs - What are they and what do I do with them?

RegApps are explained beautifully in this knowledge base article. In a nutshell, they have a tendency to multiply in drawings like rabbits - especially when one drawing is externally referenced into another. This causes drawings to become bloated and potentially unstable. In the past you were always able to purge them manually one drawing at a time or write a script to run on multiple drawings. For lazy folks like myself, we wished for Autodesk to release something themselves to fix this problem en-mass on multiple drawings. Well, this latest utility they have posted does just that for you. You will want to view the Readme file as it contians instructions on how to run this utility via a batch file on multiple files. A great thing to run overnight to clean your drawings!