PX-64 will not retain user presets but reverts to "Choppy"

I just discovered what PX-64 percussion strip can do for tracks other than percussion, but on the heels of that discovery, I was thwarted by the fact that PX-64 will not retain user presets. If I load a FACTORY preset and close the PX-64 Interface, when I re-open the GUI Interface or re-open SonarX1c or my song file, PX-64 will retain the factory preset. As normal.

Somehow when I configure parameters and type in a new name for a USER preset, although the preset appears to be saved, it will not remain. Even doing something as simple as closing the GUI for PX-64 will cause the user preset to be dumped in favor of a FACTORY preset called "Choppy".  Whatever USER preset I use, it will be immediately replaced by the FACTORY preset Choppy.  Why "Choppy"?

The user presets will show in the PX-64 GUI drop-down box and can be invoked with no problem, but they will not remain when the GUI is closed.

I have not yet been able to discern if the actual user preset is being re-parameter-ized or that simply the name has changed to Choppy without any of the internal parameters having been altered, but it seems like the parameters are being set to Choppy's parameters as well.

BTW, other plugins save their parameters and user presets as normal with no problems. I have not tried them all, however.

Any advice would be appreciated.

Toshiba X205 Laptop, Vista HP, 1666MHz Core2 T5500, 4GB Ram, SonarX1c