This is a quick and little 3ds Max script which save my time everyday by putting corona converter 1.45 (corona 6 converter) in quad menu next to new corona converter to use both in case you need it.
Just extract the zip file you download then drag and drop the MZP file on 3ds Max viewport or run this file from Scripting > Run Script... menu of 3ds Max and then click on "Add Legacy Corona Converter to Quad Menu" button. That's it.
The credit of corona converter goes to Corona Renderer team and Martin Geupel which originally create it. I just make an installation for using it along side of new corona converter in corona 7+.