Cris, which of the two methods did you use?
Edit: Okay, I finally tried this. Except I used the second method I mentioned. The one that used the FF interface.
1. I made sure I had a photograph active I was used to seeing all presets with.
2. Then I just went through the filters in the order I wanted them to appear. With each one I double clicked the preset, made sure it was displayed, clicked the menu choice to add preset. This added a duplicate to the end of the list.
3. Then, because the default preset cannot be deleted, I double clicked the duplicate preset I wanted first. Then I single clicked on the default to select it without activating it. Then picked menu choice to update the preset. That replaced the default with the one I wanted there.
4. Then I clicked on the first one I wanted to delete, and shift-clicked (in Windows) the last one I wanted to delete. Then deleted them all at once.
Of course, make a backup before doing this.