It worked!! I was able to restore my original 3DS backup data stored on my PC.
I forgot to say thanks for replying so quickly to my question, so... thank you!
Checkpoint is great; being able to backup my Gen 4 save files that I've had for 15+ years is amazing. I haven't felt this way since I bought a Mega Memory Card to backup my non-VC Gen 1 & Gen 2 games/save files! I don't like using hacks/cheats when I play, it takes all of the fun out of playing. So, it's great to have the peace of mind that my hundreds of hours of play time are backed up.
Cheers!