stall firmware simply by copying a Pico program
   file onto the thumb drive, using the normal Windows file copy procedure.
   A Pico firmware file has the suffix <b>.UF2</b>.
</p>
<p>
   You can also do the file copy within the Config Tool.  When you put the
   Pico into its Boot Loader mode, it should appear in the Config Tool as
   a Boot Loader Drive in the list of devices on the left side of the
   window.  Click on the device to bring up a window with controls to
   install the firmware.  Doing the in