Hi Beetle, there is not any built in method to MoI to backup installed plug-ins, but they are just ordinary files stored in the \commands folder, so if you want to make a backup of them just use the regular Windows file copy mechanisms to copy those files into another folder somewhere and then you'll have a backup of them.

Also when you install a new beta release, it will not have any custom installed plug-ins installed in it automatically, you need to copy any plug-ins that you have installed into the new beta's \commands folder as well. You can again use the regular Windows file copy functions to do that, you can just copy the entire commands folder from the previous beta over into the new beta and say "No" when it asks you if you want to overwrite any files.

- Michael