I don’t particularly like the mix of the old font and the new Grifo-font, so I copied and renamed two of the OpenType NotoSans fonts residing in the C:\Users\Username\AppData\Local\Roon\Application\100800756 dir to the original Grifo-name. Works on Windows 8.1. I would not say it is now of high-end graphic design, but one type of font is easier on my eyes.