You can process any stereo signal as a sum/difference pair with any plug-in that operates in dual-mono mode (gain, EQ, dynamics, etc..). Insert the MS plug-in twice, both above and below the desired processor, to achieve amazing control of the stereo image. After it becomes a mainstay in your workflow, you won’t remember how you survived without it.
This plug-in has no parameters. You should keep its GUI hidden and toggle the bypass using the DAW’s native interface.