Flashing Red Status LED means still uploading firmware image, a flashing Green Status LED means Factory Default mode,
which is what will happen if you downgrade without having saved a backup from the previous release.
Does your ZD respond when you ping 192.168.0.2 from a hard-coded PC (any other 192.168.0.x IP)?
If so, use HTTPS://192.168.0.2
and run the startup wizard.