Since Parsons Address book is no longer available for update, is there a substitute or a program into which I can move the data?
There is an application called StatTrak Address Manager 5.1 which has the capability of opening files from Parson AddressBook application.
Use the following website to get additional information: https://www.allprosoftware.com/am/FAQ/#parsons
Also, read the answer to the following question which provides the instructions on how to open the old files in the new application: https://www.allprosoftware.com/am/FAQ/#parsons