@SpudsMcToole - I believe it should be there even on older versions. I don't mind giving you hand if it helps. As of late I have a little extra time due heterogeneous world events.
On your ES carousel there should be a stylized RetroPie logo as one of the selectable systems. Basically the same as selecting an emulator/core.
Then select RetroPie Setup -> Update RetroPie-Setup script. This should update your script to the current version.
Then select Manage packages -> Manage Core Packages.
Under Manage Core Packages select Emulationstation (Installed). From there you have the options to Udpate From Binary or Update From Source.
The wording might be slightly different and I left out the number options as they do seem to change occasionally but it should be generally the correct steps to get ES updated.