[GerardvanA]

Yes, on Linux the folders are similar. However to make sure I was only using the library supplied with the WD TX software, I set the sketch location to where I extracted those files. And as the IDE didn't find a 'library' folder (as it was named 'Library'), it created it there automatically.
I'll merge them with my normal library, but will be careful to keep the correct version of the SHT2x library!

Cheers,
Gerard