The driver version in Device Manager is the correct one. Intel® PROSet/Wireless Software version 18.40 contains different drivers, and the version installed will depend on the OS and adapter model. In your case, 184.108.40.206 is the current driver version for the Intel® Dual Band Wireless-AC 3160.
Thanks for the information. That sets my mind at ease. This AC 3160 adapter must not be a common adapter in this model Envy. HP doesn't have a driver for it on their support site. I bought this on Ebay as an HP Refurbished model.