Go to Master Out and load any plug in. Name a preset and save it. Re open Master Out plugin and the plugin is there with previously saved preset name.

This doesn't work on event plugins. Go to a track event and load a plugin. Name the preset and save it. Close the plugin and reopen it. It has the previous settings but the preset now says <Untitiled>. Makes it easy to forget saving the preset when you make changes because you have to remember to recall the preset before you make changes...then save it.