Solar Studios Direct Bass 1.0.
Direct Bass is supplied as a file, Direct Bass.zip, which contains several files and directories.
Direct Bass.nkm is the Kontakt 5 multi file, the instrument itself. Load this in Kontakt.
\Manual\Manual.html is the manual.
\Presets is a collection of various Direct Bass presets and a script. This should be copied to your Documents\Native Instruments\Kontakt 5 directory.