OED 3.1.1 disk were mislabeled. Authentication codes will take you out of the confustionThe first printing of Oxford English Dictionary version 3.1.1 full license versions (not upgrade) were labeled as upgrades.
In earlier versions boxes were mislabeled.
The way to sort out the confusion is the authentication codes. They have always been correct because the software will not work if they are wrong.
|Software Version||US Authentication Codes|
|Full version 3.1.1||JBULL...|
|Full Version 3.1 Release 2||URA9...|
|Full version 3.1 Release 1||Q7DU...|
|Upgrade version 3.1||BTJS...|