I am afraid that Wood Mackenzie PathFinder is not available anymore, therefore compatibility is out of the question when it comes to Windows 10. This means you will either have to find something else or install a previous version of Windows to be able to install PathFinder.
I checked their official website and use the Search function to locate the software, but 0 results appeared. Therefore, access the page and either get in touch with them or if you have the setup package, right click it and choose Properties > Compatibility. Select a previous version of Windows from the list and then launch it.