Okay, got the SAVE button issue resolved. The SAVE button will highlight after I move the opacity slider just a bit. It still isn't saving back to LR6, though, and it doesn't ask me where I want to save to. I click on SAVE, get a box that asks if I want to save in SRBG or ProSRBG, 8 Bits or 16 Bits, and TIFF or ZIP. Once I click SAVE, that's it, the box goes away. The edited photo doesn't go back to LR6, and I actually don't have any idea exactly where the pictures are going.