Upgrade from Checkout by Amazon version 1.x to 2.1 ? in Amazon Payments Posted July 9, 2009 Hi there, It's not clear from the upgrade guide if I can follow the upgrade instructions if I have version 1.x versus 2.0. Can I just follow the upgrade instructions or do I need to make individual file changes ? If I need to make file changes do I follow the instructions for the regular install (seems like my code will be modified already causing trouble to just follow the instructions as is). Thanks, Ed Install is osC 2.2MS with original Amazon checkout module installed (no version number listed in comments of the code).