You have not given alot to go on. Give this a read:
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Devices not working but are working with the app is a little confusing. If the HD+ app can control them, then they are connected and working. You didn't mention how long ago you did this but some devices may take some time to find their way after a channel change. You may have to wake them up or even re-pair them. Another possible issue is that the devices don't like that channel.
But, I would start with a shutdown, pull power for about 30 seconds, power backup. A reboot by itself will not clear the radios.