Dupin v2.4.2 for Snow Leopard and Lion operating systems only
Dupin 2.4.2 was originally released in November, 2011. It runs on Intel machines running Mac OS X 10.6.x or Mac OS X 10.7.x only. It cannot run on OS X 10.8 (Mountain Lion) nor on systems before Mac OS X 10.6.
If you plan to re-install this version as a downgrade from a newer version you must first Trash the more-modern Dupin preferences .plist file located in ~/Library/Preferences/ before launching.
Purchase and Register
You can purchase a registration code for Dupin v2.4.2 via the Dupin main page.