648eb34d____Setting_Prelude_preferences__Option
[Description] A database retains links to each of the cached media files. This media cache database is shared with other applications. Each of these applications can read from and write to the same set of cached media files. If you change the location of the database in any of these applications, the location is updated for the other applications too. Each application can use its own cache folder, but the same database tracks them. [Option] 
Media cache database
Prelude Help | Setting Prelude preferences