Running REW latest V.5.20 Beta 55 in the latest update of Win 10. The Thiele-Small Parameters tool does not seem to work. (there is a new dropdown field "Measurement Method" that is not shown in the online help). Calculate Parameters is greyed out until I enter at least one Manually Entered Value field and tab. However, clicking Calculate Parameters changes the button background to blue, but nothing happens (except Mb/Mb in lower left values change) and no results are displayed. I can measure loudspeaker impedance and phase, so the test rig is wired correctly and sound card is working. Anyone have any ideas? Thanks.