Adding favourite folder doesn't work in "Open" dialog box

Hey there, I’m on Windows 10 with Wavelab Elements 10.0.40.

I notice that everything works correctly in the FILEBROWSER panel, however when using File / Open, it seems impossible to drag a folder to the favourites area. When I begin to drag the folder, the dialog disappears and Wavelab seems to try to open the folder I’ve selected in the wave editor.

Any ideas?

Huge thanks