Hmm, must be some special build they did over there as other 825 U.S. and some EU Rev B units do not have IPv6 Firewall included and there was a limited run on Rev C I believe that came out with IPv6 Firewall. Rev Bs had a certain limited memory so I presume the reason they removed WISH was to make room for the IPv6 Firewall programming.
The UI might be hidden or they wanted to hid it since they probably have removed the WISH code from the FW so even if you attempt to enable it from the hidden menu, WISH might not work at all.
I recommend contact DLink support and ask them if there is going to be any other FW for this unit has the most current FW version on the UK web site is:
2.05EUB09 Firmware 06/01/2012Your FW seems special and the version is not matching to what is listed on the web site. Make sure there is future support for it if needed. The could present problems in the future should one attempt to load FW code thats on the current web site. That could blow away what you have since I presume those versions do not included the IPv6 firewall programming.
Most older gen Xtreme Rev A class routers did not support IPv6, at least here in the U.S.
The screen shots and that PDF are probably for what is currently released on the market for EU Rev B routers. Again, IPv6 Firewall was not an option on Rev B models up to this point. I presume that you have a special build of FW they did for some reason.
Well, good for you. Hope it works out well for you.
Enjoy.