If you're using OS v2.0 (which you should be) the editor is actually bundled with the 2.0 update. You don't want the other editor because that is the older version which won't be able to access the updated parameters.
Current Gear: Kronos 61, RADIAS-R, Volca Bass, ESX-1, microKorg, MS2000B, R3, Kaossilator Pro +, MiniKP, AX3000B, nanoKontrol, nanoPad MK II,
Other Mfgrs: Moog Sub37, Roland Boutique JX03, Novation MiniNova, Akai APC40, MOTU MIDI TimePiece 2, ART Pro VLA, Focusrite Saffire Pro 40.
Past Gear: Korg Karma, TR61, Poly800, EA-1, ER-1, ES-1, Kawai K1, Novation ReMote37SL, Boss GT-6B
Software: NI Komplete 10 Ultimate, Arturia V Collection, Ableton Live 9. Apple OSX El Capitan on 15" MacBook Pro
I'm running the editor 2.0 on Mac 10.4.11 and it works fine. Make sure you update the RADIAS OS to 2.0 so that you can also use the editor 2.0 and the new sounds.