The latest version is on the ADJ web site for download right now.
And yes, you have the latest version.
The MyDMX software is like a few other software packages I have used: The download is the full product. Like the other software, the FULL product software needs something extra to be fully utilized. In the case of MyDMX, you need the dongle and then it's a complete package. I'm thinking of another product I carry for security that requires "feature enable keys" to "unlock" the software, and you can unlock all or some of it, depending on what you need to use.