Something is blocking the download of the content to your computer.
Please download this zip archive to your Downloads directory manually
Extract the contents by double clicking on the zip archive once it has fully downloaded (it may take as much as 10 minutes depending upon the speed of your internet connection)
While it is downloading open up a new Windows Explorer window and find the following location:
Note: AppData may be hidden, you can unhide it by following these instructions.
Drag the extracted SimuLearn folder into c:\users\<yourusername>\AppData\Roaming\ (replacing the existing SimuLearn folder if necessary).
Restart the SimuLearn Launcher from your desktop shortcut. The program may download some other files but this should get you running.