We already have a licensed version of the DMM plugin for Maya and want to try this new release.
I downloaded the version sent by the email link you sent to me and installed it.

I am getting this error after the shelf loads up;

Failed to retrieve license
Please Check you internet connection
Error code is: -100 (failed to contact server or error on server)

The firewall is off and there are no issues with the browsers getting to the web either through the proxy or without the proxy.

Now the original version that was working does not work as this install overwrote it I presume so we are stuck at the moment.
The code for the previous version does not work either. Just thought I would try anyway.

When we contacted you about the last time we installed this and a similar issue occurred, you solved by sending us the key.
Please let us know how to proceeed