Download the USAIPDEMO application and start it.
Select Ukraine PPTP from the list and click connect.
(Username: demo / Password: demo) and click connect.
Log into Steam and activate your key.
*You have 7 minutes before you get disconnected!
*You can restart the connection multiple times!
If the system opens the file with Adobe Pixel Blender, you can find a fix here
Close all other applications running on your computer, since the system gets restarted automatically.