Explanation of Source and Guide Database Maintenance selections

I know what the obvious ones below do, but am unsure about the others. Are there docs that explain what each of these do and when they should be used?

Source Gear Dropdowns

HDHomeRun
. Reload Lineup
. Manage Lineup
Guide Data
. Sync Station Mapping
. Redownload Guide
. Remove Provider

Locast
. Manage Lineup
. Use OTA Numbers
. Remove
Guide Data
. Redownload

TV Everywhere
. Manage Lineup
. Rescan Channels
. Remove
Guide Data
. Redownload

Guide Database Maintenance Dropdown
. Fetch Guide Updates
. Re-Download Entire Guide
. Refresh Station Logos
. Delete and Recreate Database

:cricket::cricket::cricket:

which ones aren't obvious?

the buttons do what they say they do. we don't have more docs atm

After 3 years I figured it out by seeing what each one did.