[split] Kodi 17.3 in 64 Bit not 32 Bit

Can someone help? I had kodi but did the latest upgrade on mac to OS Sierra 10.12.5. I no longer have the option of clicking “anywhere” in security & privacy for incoming apps, the Kodi Krypton download always says file is damaged and must be thrown into trash when I try to open from my applications so I assume that’s why I can’t open it because my mac is blocking it.
Does anyone know what i can do?? I called Apple to see if I can get around that and I can’t, I never backed up El capitan so I can’t go back to it. I’m stuck not sure where to go from here! Any input would be greatly appreciated thanks