[ovirt-users] 3.5 / 3.6 stuck

Hello, I changed my cluster and data center compatibility from 3.5 to 3.6 with a 3.5 host. D'oh! Engine: 3.6 on FC22 Host: 3.5 on FC22 (local storage) - Can I change the data center and cluster back to 3.5? How? - I tried to upgrade host to 3.6 in the GUI. Maintenance->Reinstall did not work, and Upgrade option is greyed out. Is there a way to upgrade host to 3.6? Thanks