Waveform 12.5 update questions

[Harelde]

Hi to everyone

Yesterday I finally install the update on my Waveform12 OEM.

I did it because there were issues about sending a midi clock from Waveform to my Microcosm Hologram pedal or to my Roland Verselab : the clock send never worked on the old version.
Now it seems it works, but very unstable. Anyone knows how to enhance it ?

Another problem : I use a Yamaha MG12XU as mix table and it's my audio device on my computer.
With Waveform 12, I could use the Yamaha Steinberg USB driver as Asio driver.
Now with the 12.5 this driver don't appear in the list when I start Waveform : I have to choose a Windows Audio driver and it seems to work for the moment but I'd like to have access to the Yamaha driver and I don't see how I can do it. Anyone could help ?