tunefix
Retunes can be complex, particularly if in an area served by multiple transmitters (see
Things Every... click, section 2). Even if in a single transmitter area, there are usually a large number of services that you are not interested in to be deleted (if you leave them, they clutter the EPG and services list unnecessarily).
tunefix is configurable with a page accessed via Settings, and once set up to your liking will automatically remove transmitters and services following a retune (requires a reboot after the retune).
tunefix-update
Bypasses the need to retune the HD-FOX/HDR-FOX by making appropriate modifications to the tuning data when required (instead of starting from scratch like a retune). This avoids the annoyances of retunes. To be effective, tunefix-update needs to be at its current revision at all times, and (from version 1.0.35) can do this independent of the auto-update package. Use in combination with disable-dso for best benefit.