I made some changes to a model that I want to undo. I know ProE keeps every saved version in my working directory, but I can't see any way within ProE to revert to one of those older versions. I can close the model and clear it from memory, then manually go to the working directory, and delete (or move or rename) the latest version. Then when I reopen it, it will revert to the latest unaltered version. But this is rather convoluted, and it seems like if they go to the trouble of saving every single version, they would give you a way to get back to a previous version from within ProE. Am I missing something?