The latest DVR release has a full guide mapping editor, so you can easily fix the guide data for missing or mismatched channels. This also means Channels DVR can now be used with ClearQAM.
Click the pencil icon next to the lineup to make changes to it. Click the refresh icon next to the pencil when you're done to refetch guide data.
Full release notes as always in https://community.getchannels.com/t/release-notes/750