An issue on certain platforms with assembly reflection was causing a build error message (post-build delete and copy of the maps dll) with Flynet Solutions generated with the IOHelper Project option. This was reproduced on Windows 7 x64 with VS2010, but could affect other platforms as it may be related to a security update, as it only recently was reported.
New installer: http://flynetsoftware.com/2010L/FVVSAddIn.msi