By the way, I think this will work too...
Instead of entering the long https://.
.. url you could type this:
Then edit your C:\Windows\System32\Drivers\Etc\Hosts file and add this:
Notice that I use http instead of https. This way you don't need a certificate. Also ChevronWP7 only has a certificate for the original url. The url I gave doesn't really exist. But the change in the host file will forward the call to the local machine. Port 443 is actually the https port on which ChevronWP7 is listening.
So with these changes you should be able to use ChevronWP7 for locking and unlocking. But you won't be able to use your valid developer license because the phone will still not be able to reach the original servers.
A hard reset will restore the registry-settings, so if you really want to use your legit license you can hard reset of wait a few days for my registry editor.