The files should be OK. Might have just been a caching problem on my end.
A brief description of the changes from the readme file:
/// V5.0
/// 3/30/11
/// Replaced ReadFile and WriteFile with FileStreams. Thanks to Joe Dunne and John on my Ports forum for tips on this.
/// Simplified Hid.cs.
/// Replaced the form timer with a system timer.
I went with FileStreams mainly so it would work in VB as well as C# without the InvalidOverlappedToPinvoke error.
Jan