My plotstamp parameter file would not save, and reverted back to the old version without recent changes when I edit the parameters in the plot dialog - plotstamp dialog box and hit ok. This happens with Bullzip PDF printer. I switched the printer to the AutoCAD DWF printer and was able to update the plotstamp and save it. I then switched back to the Bullzip printer and the plotstamp worked as I wanted. I am just posting so that others that run across this issue will know the work around.
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.