1. It's already been like a month, hasn't it? 2. If I BUY an addon scenery (that I cannot return), I expect it to work (duh). 3. Not answering customer support tickets is not good customer service (EVEN TWICE). 4. I genuinely think that the installer is broken for everyone but the scenery just doesn't have that many sales so it flows under the radar. I mean you can try buying it and installing it.
I guess that sums it up quite well and is a valid reason not to use xaviation anymore.