fmp17 Open and edit files in container

[Pete Schlosser]

Hoping someone can help! I've searched Google and the forums and haven't quite found the answer I need. In my mind it should be a simple one but it never seems to work out that way. lol. Anyway, to put it simply, I'd like to drop an Adobe Illustrator file into a container and have the ability to open, edit, close the file and have these changes reflected in the container's contents eliminating the need to bounce back and forth between OSX folders and Filemaker. 

I've seen some info about using "Open URL..." but my attempts to use this have only resulted in a Safari browser window opening with an error message. I'm assuming I'm missing some link that sends it to the required application?

Thanks!

Pete