I think you forgot the "Resources\Bitmaps.resources" file!
You are absolutely correct. I'll try to fix it soon. In the meantime you can download the resources file from the SVN.
I'll wait for that!
P.S. SD Class Diagram Addin seems to be a nice tool! ;)
I've uploaded the updated file. Note that this is a very initial release, and I've just figured out it only work in build 2038 of SharpDevelop. Anyway, enjoy.
I downloded again and Resources\Bitmaps.resources is not there!
Did you really uploaded the files including Resources\Bitmaps.resources?
Don't worry! I went to SVN and "Checkouted" it!