@Martijn70: are you using Windows 10?
I’m also using SSD. Maybe its something to do with SSD sleep mode or power management in recent win updates? Haven’t had the time to test it yet… Then again, SSD seems to work in all my other apps without any lag and it also worked before in Cubase…
Update: As it turns out, I had an external SSD drive (which I use for backups) mounted in Media Bay by mistake. I probably had duplicate copies of the same samples on that drive as well. Maybe that also caused the problem. External SSDs in Windows have also been known to fall asleep without waking up again .
After I unmounted the drive, the presets loaded instantaneously. Oh man, it felt so good to have my preset browser back again!
If your experiencing long loading times in your preset browser, try unmounting your drives in Media Bay one by one. My guess is, you will find the culprit pretty quickly.