Hello Stefan (D.),
Firstly, I searched program-wide for the *.dll, which weren't anywhere available.
Then I load the new package one (despite it was defintely compiled later, it has the exact same product version number, in file properties; this only as a notice).. and yeah I find out:
You have to install the Internet Explorer Toolbar. If you don't install this plugin (like I do it before, all another options were checked), at least the missing HtmlToPDF.dll will not install.
I also noticed, you can't choose the Outlook-Addon (it's grey out), if PDF X-Change is not your standard printer. Thats not a problem, because its muuuch better than other PDF-Printer!
Thanks for support,