I would appreciate it if you could respond on the following questions:
Does the operator of OUNPPM require a valid licence?
Could OUNPPM be applied to predict the effect of airborne aircraft?
You will have to use the Request Support because there is nowhere mentioned about the license of this software or if it does require a license in order to work properly.
Use the following link to reach the website, then click on the Fill Request Form and state your issues and questions for the software: https://ohiolink.edu/content/request_support