VERIFIED SOLUTION i

How to confirm if the MailStream Plus PRFZIPDR file format/layout changed with the 8.3.2 release and when was the last time it changed

N/A
 
The layout format in the 8.3.2 Release has not changed..
The last time there a change to the layout of the PRFZIPDR file was when support was added for USPS FSS (Flats Sequencing Systems) presorting, which was in the MailStream Plus 8.0.0 release in April 2011.
UPDATED:  August 14, 2017