Change WebUI port to 4434 from Command line:

webui disable
webui enable 4434
Unfortunately after a cpstop/cpstart or reboot, the 4434 port will not survive. It rolled back to 443 again. 
Solution:
Firewall ->Properties -> SecurePlatform -> change main url to : http://x.x.x.x:4434
Webui.png?resize=400%2C228Webui.png?resize=400%2C228

goto command line do webui changes
push policy.