Open MOVEMENT's Preset Browser and select the 'User' tag
Right-click one of your user presets and select 'Show File in Folder'
Drag the custom XML preset into the resulting 'Presets' folder in Finder (Mac) or Windows Explorer (PC)
Remove the current instance of MOVEMENT, then add MOVEMENT back to your track.
You will now find the new preset when you search by name or select the 'User' tag.