Last night I replaced my battery and my unit would not go any further than the Pearl logo. So this morning I downloaded the firmware upgrade from http://voxrightnow.custhelp.com/app/answers/detail/a_id/2243/related/1
, and followed all the troubleshooting instructions that popup when you start the program:
start the program,
remove the battery,
hold the play button while plugging into usb,
release the play button the the term "initalizing" replaces "searching",
click the start button to replace the firmware.