I'm afraid not; I'm a Mac guy. You could try using the search function for Presets on your Applications drive.
Here's a trick I use: Name a preset something unique, like "madonna's bra." Then search your disks for "madonna's bra." IF the presets are stored as separate files, there it is (This is the case for Pr Keyboard Settings, for example.).
If your search produces no results, they're probably stored either in the Prefs file or an aggregated Presets file unique to that plug-in.