The database location is mentioned here: How to Backup and Restore Hook Data – Hook. I wouldn’t recommend modifying it , particularly while Hook is running.
@cremoer has shared an Alfred workflow for this . Our Alfred-using dev will comment on this. I’m a LaunchBar user myself, but the same should be possible for LaunchBar.
We ourselves have noted our intent to provide a window on Recent and all links, and some other global information; and automation of Hook itself. Using launchers and Hook together makes sense.
I believe @RobTrew has posted somewhere on this forum about using Keyboard Maestro and Hook together.
Once multi-mac Hook syncing is released, the stage will be set for Hook iOS integration.