I hope it’s okay to respond to this old thread, but it seemed the most relevant.
If you’re having trouble seeing your old SD2 presets not showing up in SD3, it might be that you need to switch the sample library first. For example, I created an SD2 preset using the Avatar library so I had to switch to N.Y.-Avatar in the dropdown box at the top before I could see a “SD2 User Presets” entry in the menu to choose from.
