DXO Pure RAW 4.0 slow

Hi, I am still using DXO Pure Raw 4.0. Normally the conversion with the most advanced method took 15 s on my PC. Now it takes 30 to 60 seconds and the remaining time does not show figures that makes sense. At the beginning it converts very fast, than it stops for 15 to 30 seconds with showing 2 seconds remaining. The only change in the last 9 months was the change from Win10 to Win 11. Any tips how to solve it?