The Garritan Authorized Steinway (basic) proportional sustain does not work. It's either full on or full off. There is NO IN BETWEEN! Could it be that the basic software does not include this feature?
The sustain pedal will not release at the end of a composition. It causes the file to continue "ringing" long after the file has completed in spite of a zero (off) setting for the sustain (CC64) and also a zero setting for CC07 and CC01.