The IDWedgeBT Application Updater requires a special programming cable and a PC with a serial port, or a USB->Serial adapter. The application has on screen instructions on how to perform the update.
The quick guide contains screen shots of the procedure, along with information on the recommended USB->Serial adapter.
IDWedgeBT Application Upgrade Quick Guide.pdf
Download the archive below and extract to a directory on your PC, there is no installation process, simply run the application from the directory you extracted the archive into and use the special programming cable.
IDWedgeBT-HID-Updater-3.5.zip
The IDWedgeBT Keyboard users manual, with revision history:
IDWedgeBT-HID-Users-Guide-Version-3.5.pdf