That's the version that I'm running and it's the latest that I'm aware of. It's compatible with NX 5.0 through at least NX 10.0.
BTW, the SPLM designation for this license server is V6.1.1 and was required for running NX 9.0. The previous version, V5.3.1, was released with NX 8.5.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA Siemens PLM: UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.