Yes, needed to download the latest from the Samsung site as the smart things app wouldn't download the latest one. Also did a factory reset after installing the latest firmware as I remember last time after installing the update on the Q950T, even though it said on the smart things app I had the latest version, it needed a factory reset to get the LPCM working.
One thing related to this which I haven't tried. Apparently if there is a new version that the smart things app refuses to download, switch off auto download and try it again and it might download.