...I decided to host it myself:
unfortunately the RpgMonsters.zip file is missing, Firefox only downloads the front page (no monster statistics so won't work offline), and the German version is kaput.
Monster Advancer on d20PFSRD also has dead website link.
Uploaded the Zip file (I forgot that one): http://blackandgold.de/monsteradvancer/RpgMonsters.zip
Sadly, I have no clue who is responsible for the german version, else I would gladly host it too. The link is there from the previous iterations, I didn't do anything with the HTML. (I am just someone with webspace to spare, nothing more)
I have filed a report with d20pfsrd about the dead website, so they can maybe redirect to my webspace. But it is probably of a lower importance.