Terrain Toolbox won't find .r16 (RAW16) files

I am trying to use the terrain toolbox package preview-2.02 and want to import height map using the “Tiles” option.

It says that my height maps can be in 16 bit RAW format…cool.
But when I try to browse to my heightmaps, the only format I can choose from the drop box is 8bit RAW. No “.r16” available. How am I supposed to import a RAW16 if it wont even let me choose the file?
5226647--521072--upload_2019-11-29_20-25-41.png

Nvm I realised I can rename my .r16 files to .raw and it works. A little bit annoying that there aren’t more options though.