Unfortunately we are having technical issues with our client download and will be closing the game from Steam purchases until we get it resolved. No information on how long that will take or if the issue will be fully resolved. We will keep you up to date on any progress or developments. If you purchased the game but never received an access key, please contact us so that we can get that to you (even if you requested a refund).
The game can be fully accessed from your web browser if you have purchased the game, you can still access it direct from there:
https://www.kingofcrownschess.com
Thank you for all of your support and understanding and sorry for any issues.