Let's be clear here; you're not downloading the entire database, but you do have the ability to select anything from the database to be downloaded to your particular app, whatever it is.
As for settings - for the most part, the web service does not adjust any settings. That's up to the user - and rightly, since every manufacturer utilizes different settings for different scanners. However, many apps will download custom table entries (for example, for rebanded trunked systems, which have a particular flag the app can query).
best regards..Mike