Just read this post after pulling out the little hair I have left from countless failed imports. Trying to upload the wptest.io test data to a WP 4.5 installation, either locally with XAMPP or online with my host. Trying this out now and reporting back ASAP with the result. Soooooooooo glad I have found this post and an alternative to the piece of $à!&% that wordpress.org calls an importer. Thank you so so much, you have no idea how glad I am to see a light at the end of the tunnel. I just hope it is not a train coming my way, fingers crossed. Go devs!