Wait for file to download.
Click "Install"
Click "Done"
Once you've opened it, You should see the screen below
Click on "Login"
Now it should ask you to login. (Profile name: INFINITY)(Make sure to select INFINITY at the bottom) You should have your login when you purchased from us. (Check your Spam in your email if you have not received your login, alternatively, you can view your login details under "My Services")
Select the first one shown
That's it
