Bump, really need some info on this, with the definitive edition coming up and a lot of modders making it clear they won't be revisiting their mods to update them for it I think this should be common knowledge. This method is the only one I've found and I have yet to get it to work. The trick is the Projects folder. When you create a placebo add-on in DE to copy the files into it makes a meta.lsv in the Projects folder. If this file is altered or deleted the add-on won't even show up in DE, but if you leave it and try to load the project with the mod you're editing's files copied over, DE just gives a generic "This project could not be loaded" message.