As of 9th March 2016, Audacity has updated to the latest PortAudio sources (r1966).
We would like anyone on Windows 10 who had to use Audacity 2.0.3 or earlier to avoid Audacity's Internal PortAudio error to see if the latest Audacity "nightly build" now recognizes all or some of your devices.
The latest Nightly Build for Windows can be found at the top of this page http://gaclrecords.org.uk/win-nightly. Note that Nightly Builds are for testing. They are not finished releases and should not be used for production work.
Please start a new topic to give us your feedback.
Note: The PortAudio update does not fix the issue where the Left/Right output balance is reset to centre when launching Audacity or when changing audio host or device in Audacity.