Hello,
after reinstall windows on my system and blender, the crowd render addon don´t work anyway. I get a errormessage such in the picture. I tried also a blank Blender install without any changes in user preferences, but it don´t work. Any ideas?

Hi Gopper, yep, sorry about that, some windows systems will need to update with the C++ redistributable for VS 2015 when using the latest version of the pre-release (which is version 7 at the moment or cr_012_bl2789_7.zip as the file name for the installer).
Thanks for pointing this out :)
For anyone else that has come across not being able to enable the addon after installing it, and you're on windows, here is the official Microsoft download site.
https://www.microsoft.com/en-US/download/details.aspx?id=48145
Ok, thats strange. I have installed Visual Studio 2015, wich is needed for another software and after that, now the addon works fine. Maybe thats interesting for other users.