Always make sure you use the right software for the right device. Trying to update wrong software update to a BB Talkin intercom device will cause the device to stop working.
Updating will only work through Windows devices!
Download PDF Software update Instructions for BB Talkin Devices
Download the update wizard
IMPORTANT NOTE:
If you have installed the previous DFU WIZARD version, please uninstall it. Then download and install the latest version 1.4