How to resolve no longer able to get into List Conversion Plus screens

Products Affected:  List Conversion Plus
Operating System: iSeries

After installing MailStream Plus on IBMi, they can no longer get into his List Conversion Plus screens
Resolution was to install List Conversion Plus 6.5.0 again to recover his lost programs.
Now they are able to use List Conversion Plus and get into all of the screens. 
UPDATED:  August 29, 2017