As Staye3 says is on the cog (config) then click market if it can get to the internet.... but as it cant then login to the support portal. Under your VxRail there is a package download area and its listed in there.  If not you can register a trail and download it:  [URL]#!trial_software
In case of our VxRAIL is used in a place, which couldn't connect to the internet and EMC support site. How to install them, which include Cloudarray, RP and VDP, and use it on VxRAIL?   Thanks a lot.
How to install Cloudarray, RP, VDP on VxRAIL