1. On the page https://secure.simmarket.com/fsdreamteam-zurich-klothen-v2.5-fsxp3dfs2004.phtml I cannot find a demo download link.
It's the first time you said you bought on Simmarket. Yes, there's no link for the Trial, the Trial is downloaded from our Products page.
2. FSX P3D FS2004 simply belongs to the product name, therefore I copied the whole thing.
Which I couldn't possibly know, I thought you wanted to take advantage of the fact the license is valid for all simulators, including FS9, so I gave you the EXTRA information required for FS9.
3. Strange enough, I cannot find the links to the demo anymore. Would you be so kind and send them to me?
The "Products and Downloads" page of this site.
means: There was no eMail from Digital River.
Of course you haven't got any email from Digital River, you bought on Simmarket! Not the email from Digital River would make any difference because, the email with the installation instructions was the one from FSDT which, again, you won't get it you don't buy from FSDT, but the activation is also explained in the scenery manual, because we assume users know our products come with a Trial that should be installed before purchase.
Note that, we have been using this method since 2007, it's nothing new.
Please investigate on your side.
I'm not sure what there's to investigate, other than maybe adding extra lines to the description on Simmarket that you are supposed to download the installer from our site.