https://support.ruckuswireless.com/contact-us
Hi Nomatch,
Jijo had already sent you a link with the procedure, did you check it out?
If not here it is again:
http://docs.ruckuswireless.com/fastiron/08.0.90/fastiron-08090-upgradeguide/GUID-9B5D5A56-039D-44FB-8FD2-B9B55E71ADE8.html
Hope this helps.
Thanks
Hashim