I've uploaded the Windows installers for 5.09 to SourceForge. The version in the filenames is actually 5.09.1 because there are some slight changes in the sources, which are tagged csound5_09_win32. If you like, the filenames can be changed, but should not conflict with the files in the beta release (which could be removed or also renamed).

Updated build instructions are attached. There are some critical version changes: regressions to MinGW 4.2.1 with dw exception handling, and to Graphviz 2.8.

Regards,
Mike