SusProg3D is now available in 64-bit.
For all supported versions of Windows 64-bit.
A small performance improvement has been found compared to the 32-bit version.

Added the functionality to input parameters to generate a 4th order polynomial to calculate the tyre radius and the contact patch centroid offset.
The required parameters are the tyre radius and contact patch centroid offset at zero camber, static camber and maximum camber.
Thanks to Julian for this one.

Added a stop ring for primary and secondary coil springs. The position of the stop ring controls the transition point from the initial spring rate to the final spring rate.
Thanks to Adriano for this one.

Changed the spring calculation to use frequency or wheel rate to calculate the spring rate.
Removed an unnecessary Calc button and combined the spring calculation into the usual Apply button.

Excel input and output now include all four ride heights and reference points.
Previously if you were working with the front or rear suspension, then only the ride heights and reference points for that end were included. Now both ends are included.
Thanks to Neel for this one.

Excel output now allows for specifying separate bump and droop, roll and turn sections.
Previously all data was in one section. This now makes it easier to export just the sections of interest.
Thanks to Dimitrios for this one.