Auszug aus https://www.kvraudio.com/forum/viewtopic.php?p=5983754

I guess the easiest way is via the „quick“ button (6th from left, between „Keyb“ and „Files“. Click on it and „drag and drop“ your favorite instruments there (from libraries and/or database). It works as an alias, or smth: you can add multis, banks and instruments, create folders etc.