Yes, you can upgrade from the Spyder X2 Elite to Spyder X2 Ultra without having to purchase new hardware. To purchase the software upgrade, follow the link below:
https://goto.datacolor.com/UpgradeSX2Ultra
or use the Upgrade menu entry in the Sypder X2 software running in Spyder X2 Elite mode.

Important: The Spyder X2 Elite to Spyder X2 Ultra software upgrade is currently not available in Asia