How to get the source code
The latest code is available on GitHub:
The second link is not part of »PSR Registration Shuffler« but could also be interessting. It contains a few Python scripts to deal with PSR-9000 / 9000pro registrations.
Please note, that the source code has suffered quite from bit rot, as it really has not been changed anymore since around 2011. It uses the following runtimes / libraries, that have all been superseeded by newer versions: