LR 6.9 supports the X100F, X-T20 and GFX. It is expected soon. In the meantime, simply change the camera name in the EXIF data to X-T2 or X-Pro2 using an EXIF editor. After doing so, current LR versions will work just fine.
Lou ~~ personally, I tried the latest S/P version from the Fuji website as you suggest but didn't get anywhere with it. It doesn't ask you where you want to put it when you go to install, it just goes (I'm assuming) to the hard drive. I tried importing the files again and got the same "no images" response from LR. Not terribly helpful, I know.