Deepsky, thanks for responding.
I have been diligently searching for editable files that contain Effects DSP settings. On my C: Drive, the User Settings.ini file has multiple Effects DSP settings. I have created a "Clear All DSP Settings" preset to see what it looks like in the User Settings.ini file. I was then going to paste this setting, in which all Effects DSP settings are set to "none", into all other Effects DSP entries, to see how that works, of course, saving the original unchanged User Settings.ini file, in case this does not work. I have not pulled the trigger yet because I like to take time to process and go over a few times in my mind, perhaps coming across something that I hadn't considered initially. I will post the results after I try this avenue. Hopefully, this brings the result wanted.
I have scoured the file structure of J River for any other areas where a default may be called from; I can't find anything else. I don't like messing with the registry, though I have searched there, as well. When I uninstalled and reinstalled, I figured that I would have to re-enter my license code, but I did not, so there is something lurking "out there" that stays installed after a complete uninstallation, which keeps that information, at least (maybe more, much more, but where, I don't know).
I have also begun to scour the forum. There was a somewhat similar scenario a while back, where additions to the DSP studio from third party vendors had "unintended consequences" in J River MC. I don't run any third party software, but a long while ago I did add an additional Parametric EQ entry, called "Parametric Equalizer 2". I did want to delete, in case that had any "unintended consequences" but there is no facility in MC to delete that (at least, I am not aware of how to do this).
Anyway, when I change the User Settings.ini file, I will post the results. If anyone here thinks I am on the right trail, the wrong trail, or knows that I'm really going to mess things up, please post so I have the best and most info possible.
Thanks for reading, and helping.