KOMPLETE AUDIO 6 MK2 lower quality sound after firmware update ?

Hi, I'm experiencing quality downgrade after reinstalling windows and updating KA 6 MKII (drivers and firmware), it's most probably caused by this step, I didn't find anything else potentially probelmatic.

I didn't update drivers for like 5-6 years, and sound was clean, worked very well with my reference setup, all great, so after clean win10 install I confidently updated everything, now it sounds like there's problem with dynamics or something ? Its like sound loses articulation on dynamic changes I would say, not sure but its way worse.

• old drivers were probably "ativeInstruments_UsbAudio_v5.22.0_2021-09-01"
• firmware version uknonwn (I won't recall unfortunately)
• I had installed komplet control software (but i doubt that can affect sound)
• now all updated to latest
• win 10 and mainboard installed and updated
• hardware was not touched

Any ideas please ? I did some research but it seems we can't roll back firmware. It's very bad situation, I was so satisfied with the sound and settings.

Thank You in advance. .R