Sorry for delay, I did forget to subscribe the discussion alerts.
I already ask this from ntkernel, I asked:
Can I use WinpkFilter 3.0 binary in non-commercial open source project? The project is free and I am to include WinpkFilter 3.0 binary files in my open source project.
My project will be available to public and have MIT license.
an here is reply:
You are not allowed to include WinpkFilter
files into your distribution unless you purchase a Developer license
. However, you can request users to download and install WinpkFilter
be able to use your software.
So I think you can use the software if download WinpkFilter from ntkernel.com