I have posted the revised C3D User Guide on the C3D web site, it is now available as on-line help, as a downloadable and printable PDF file, and as a Microsoft compiled help (CHM) file - all can be downloaded from the web site. Each version will display a date on the first documentation page so that users can verify that they are up to date.

The most significant changes involve support for UTF-8 encoding and more than 255 analog data channels for IMU support - a large number of edits have been made to bring the document up to date with modern usage and correct a small number of documentation errors in the older manual. Full details of the changes are documented in the documentation Revision History.