Nope, didn't know of it. Though I wonder how well that "save as .nes" option works? I don't think it's possible to convert a disk to a cart, without tons of code-rewriting (if even just fixing the fact that FDS runs games from RAM at $6000-DFFF, plus the BIOS at $E000-FFFF, whereas carts use $6000-7FFF for SRAM and $8000-FFFF as ROM).
Will have to see this later.