Looks like the developer edition has been removed from TG website in the past couple of days. Is it not going to be offered going forward?
They will not be supporting the developer edition going forwards. They released the unlocked Enterprise Free Edition and will support that in the future.
Thanks @Jon_Herke! That is good to know. I am switching to the free Enterprise version then. The Developer version v3.0.5 has been giving lots of the trouble .