if you continue to the next page of the installer, it gives you the option to update other components of AC, did you do that?
Also, it mentions modules that may be out of date. Sometimes you have to manually open each module when AC has been updated before it recognizes them as being of the latest build.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"