Thanks for the reply Brian,
Yes Work piece offset, and its not an issue of saving with mach closure, its an issue of installing a new updated version of mach. I find that the tool list is intact but the WPO's are gone, showing only the blank page. once i remembered to write them down, but the one time i really needed to, I forgot ! This appears to be the only feature that is renewed with a fresh install. I tested it just a bit ago when i installed the newest version of mach 3 and sure enough the wpo page was a clean sheet.