Ugh-oh. Not again. The last time it happened, they took the old version off the AppStore and ultimately forced everyone to re-purchase their new and shiny remake for the full price. I'm still bitter about it. You want to make a new version - fine, but taking the old one off was a real shitty move (* see EDIT below).
So despite of how it sounds, that ^ part is the exact opposite of good news.
EDIT - I misremembered, my bad. They refused to rebuild the original prompt for x64 target. That's what it was. They didn't take it off the store, they just claimed that rebuilding for 64-bit platform was such an immense hassle and monstrously complicated task that they just can't. But! Lucky for you we just happened to have this brand new version that is 64-bit. It has few things improved, but largely the same. You'll love it. $15.