The old website was support.arubanetworks.com. This site is still active but will disappear over time.
Then there is/was mnp.arubantworks.com. From this site, you can transfer all your assets to the new (and the only one which will "survive", as far as I know) website asp.arubanetworks.com.
I only use asp.arubanetworks.com to download software, license management, and support.