Hello Les,
No -- Hauptwerk v6.0.2 isn't ready for release yet.
The problem (pops/crackles) mentioned in this thread would only ever affect the bottom octave (and in extreme cases maybe the bottom part of the next octave up) of 32' ranks, and (in extreme cases) maybe the lower part of the bottom octave of 16' ranks, i.e. bass pipes whose pitches are below 8' C, and only if using 96 kHz, with the harmonic-shaping filters are enabled.
If you have audio glitches in any other case then it would be due to something else (e.g. CPU overload).