We've tested the Hotfix for many months in the user base with a 100% success rate. I'm confident you'll have the same results provided you completed the other tasks in the "Do This" thread.
Yes, it will be included in the next A320 series update, which will come sometime after the A330 release.
This is a commercial site for the support of Aerosoft products, not a general interest one. Try Avsim.
I just tried simmershome.de and it loads just fine. So you could try going to the homepage and navigating to the download section from there. Also, you could also try flushing your browser cache to see if that helps.