1. In Evolve hover your cursor over your name on the bottom right hand corner of the screen.
2. A popup with appear. Refer to Client Version:
There are two different ways to check the version in standalone Evolve depending on your version.
1. Go to Help->About
See the PatchLevel. Ignore the first 3 numbers. For example in this case the version is 126.96.36.199
2. If you have the Home ribbon go to the top left Globe->Help->About
In this example the version is 3.9.1711.609