Ok, I reinstalled Directx again and that did the trick. It works now.
Ah, very good. You are not the first who has to perform this twice. Otoh, I think you had this installed earlier ?
If we only could find our ways in these specific Microsoft pages (which version is the newest, which implies what. etc.).
So if you are using Quality setting #1, does it send 88.2Khz to the soundcard/dac?
No. This only happens when Double or Upsample is ticked (and this is not possible with #1).
When you select Quality setting #2, and check the 'double' box, does this then upsample to 88.2 Khz?
Literally, no. That's what Upsample is for (not possible with #2 so far). It outputs in 88K2 though (bps is twice as high -> doubles the data).