A user on DPReview noted an important point: a product key for an earlier version of Capture NX 2 should work on all subsequent updates, including version 2.4.7. This means if you can find a legal copy of the original Capture NX 2 (even v2.0.0), its key should unlock the final v2.4.7 update.
: Version 2.4.7 was one of the final updates released to maintain compatibility with newer Nikon DSLR cameras of that era (such as the D4S and D810) and operating systems like Windows 8 and Mac OS X Mavericks. capture nx2 2.4.7 product key 12
For advanced adjustment tools similar to Capture NX2's unique "Control Points" (powered by Nik Software), several current platforms offer equal or superior functionality: A user on DPReview noted an important point:
The risks far outweigh any benefit, especially given that free, modern alternatives exist. For advanced adjustment tools similar to Capture NX2's