Go to amazon, find the record of where you ordered the radio. Click "get help". It will start a conversation with a bot. Jump through the bot's hoops for a couple of questions to convince it you need a human from ABBREE.
Tell them your gmrs-9r has the channel 15 problem and you need the software.
They will ask for your email - but I think amazon filters emails in this chat system, so they will ask you to send a screenshot of your email. I typed my email into a text editor, bumped the font up so it would read nice and clear, and grabbed a screen. They responded very quickly with a link to download the software, which worked exactly as described in the video.
Both of my radios are working perfectly now.
Enjoy.
