You'll need to find your LW saved folder. Go to LW's library, click on Saved Files then click Explore...your saved folder will open for you. This is where you have to add files from, when you transfer them to MMJB.

I don't have MMJB installed anymore, so I can't remember exactly the steps for transferring files. But...it'll be something like File > add file, then browse for your saved folder & add from there.