A quick update: http://support.nextlimit.com/display/mxdocsv3/MicroStation
Just looking at this post. I believe the plugin is no longer available as it is not listed in the link above. Also , if it was.. would it work in CE?
The most recent version of the plugin (v1.3.4) is compatible with MicroStation SS3 and Maxwell 188.8.131.52. Once Maxwell 4 was released, Nextlimit decided to discontinue support for quite a few host applications. It's a pity but Maxwell 3.2 is still a beautiful render engine and MicroStation SS3 is still a joy to use :-)