>Metin, can you please confirm the purpose of Molebox- easy installation? Protection of source code?
>
Both...

>One likely explanation would be the need for UAC Admin Escalation if Molebox is trying to install runtimes to a Shared, System or Program Files location. You could try running your app with admin escalation to see if that resolves the issue.

Tried as admin with no success, but actually it was working without admin rights before 8.1.