Well after some further tests, like mentioned it is possible having flash working locally on the computer. In the case of Poser, witch is strange it somehow still does not recognize the flash library. The Flash Icon is gone but it still is asking for a Flash Install so will have to figure out what it depends on. Other Applications like IncrediMail work again like a charm.

Here you can download the old Flash versions

for a running fresh Install, Version 11.3.300.268 - UP is locked by Microsoft so you will need to get a prior version.