While we don't plan on releasing a special Windows build for the Runtime Converter JNI library, we have tested that the converted code runs just fine on Windows using the WSL (Windows Subystem for Linux) / Bash shell. While there's no need to post an exact guide, we tried it using the default (apt-get) version of gradle and Oracle Java 8, as well as the Ubuntu 16.04 distribution.
Just a simple echo "test conversion" was run on our online conversion site php2java.com. We then typed "gradle bootRun" and loaded the servlet in Microsoft's Edge browser.
Result (just a simple test):
A good Java developer will also know how to setup a debugger to connect to the process running inside the WSL from a Windows IDE such as Intellij or Eclipse.