New File

Tools → Curve Manager → File → New            Shared Dialog Box
Creates a new property file in the Curve Manager. You can use that property file to define the dynamic characteristics of components or to define a wheel envelope.
 
For the option:
Do the following:
Type
Specify the type of property file you want to create in the Curve Manager. The property file types are:
■Frequency Bushing (if the Ride plugin is loaded)
■Spring
■Damper