I bought v. 33, but switched to an older (23), the key is not valid (according to your docs), I cannot buy a v.23 key anymore
From version 24 on (at least at 25) up to current the right surround channel is not working anymore.
Also the player stops after 5 minutes playing, now wave, but the button is in 'Play' , stopping and starting (sometimes multiple times) can resolve the problem somehow. (This is also in v.23 and 33)
I use win10 and stream from QNAP NAS (WLAN), the normal working from it is fine. When MC plays, there are no problems.