remote desktop manager usage without internet

Everytime we start the remote desktop manager tool, we get a pop-up mentioning we need to register. We don't have internet connection on the machine we want to use it and i am unable to register with our registration details by just entering email address and password. Once i click next it wants to connect to the internet which fails.

I have enabled the no internet button in the settings but this doesn't help.

How can we continue using the software ?