For what it's worth, SourceForge allows projects to determine whether their downloads are subject to export laws, and to disable the blocks[1]. Support for this was added in early February, several months before the notepad-plus-plus.org domain was registered. There's no technical or legal reason why N++ had to move off SourceForge; they're simply throwing a hissy fit.
[1] http://sourceforge.net/blog/some-good-news-SourceForge-remov...