This is a small script to convert SE plugins to Legendary Edition.
Unpack the file and place the "scripts" folder into your SSEdit folder. When asked merge it with your current one.
Open your plugin in SSEdit.
right click and apply script. Find "Convert SSE to Skyrim" and run it.
Copy and paste the plugin into LE Data folder and open it in the CK and save the plugin.
It is now ready for use in LE
Basically all this does is change the SSE plugin from Form 44 to Form 43 (LE)
This 100% works as I have tested it extensively.
Don't even remember where I got this script but I saved it from the dustbin of history, and perfected the process of using it.