The new version (known as PHOENIX EDITION) has better speed, compatibility, accuracy, and has support for DPC+ games like my Xmas game Stay Frosty 2. The DPC+ games need a DSi, which has a 2x faster CPU than the original DS.
I was intrigued, so asked if it would run on my 3DS XL. Yep! I then asked for how to install it as I'd never messed with homebrew on the 3DS before. A link was provided with instructions to install TWiLight Menu++, which has instructions for the 3DS, DSi, and Flashcard. Took a while, over an hour as my 3DS was not yet running custom firmware, but was easy to do. Would have gone quicker if I wasn't keeping meticulous notes about each step.
StellaDS PHOENIX EDITION can be found here.
StellaDS doesn't yet support the newer CDF/CDFJ/CDFJ+ games so it won't run Draconian, my port of Bosconian.
Space Invaders
Stay Frosty 2
NOTE: StellaDS doesn't do the music very well, so set Right Difficulty to A to turn off in-game music - your ears will thank you

Space Rocks