Alternatively, you could append the 'updated' system(s) to your Favorites list, then delete any duplicated data.Thank you for explaining that. Not being aware of this need, I think there are MANY changes to the trunked, digital channels like Highway Patrol and Fire, that have not been updated in my Favorites in many months. Arrrrrrrgh.
Sounds like a DELETE and redo are in order.
Of course every system is different, but I imagine that with established systems, such as Ohio, major changes are infrequent. Most likely any changes will be "One-sies and two-sies". So you may not be too far behind, if at all.
You might think about updating the full database and writing the full database to your scanner. Then turn off your Favorites Lists and just monitor from the full database. If you discover any new channels of interest, that might give you an idea that you have Favorites List work to do.