Not sure which version we had
The following link has EW2007, EW2009, EW6, and EW7 downloads. 2007 is the oldest, then 2009 which was first released in 2009, then EW6 which was first released late 2014, and EW7 is the latest first released in 2017. For the most part CDs were mainly used on 2009 and prior so that might give you some help in figuring out where to start. You will need your license information to activate whatever version you have.