Hi, wondering how this issue is progressing? I get a similar issue but not on cloud files.... on pretty much all folders. I can only select from the recent list which does not help when creating a new rule or working on others in the library (but not in the recent folders list). To date I have worked around it by creating a shortcut to the folder in the finder sidebar and that way I can select that folder when I do a preview.
I assume that what should be ahh-ending is that Hazel should default to the 'watched' folder when previewing a rule