I don't see any support for the tower board or the K70 processor in any of the SDK versions. Is this a dying part?
K70 and K61 120 and 150MHz devices are not on the roadmap for support within KSDK.
Here is a link to see available devices and roadmap of support for the KSDK_v2 release.
To date the plan is to retain the CodeWarrior/IAR/Keil support for those mature (not dying) products. MQX4.2 also has the support for K70/K61.