Whitelist System
DX9WARE's uses a username & password whitelist system only allows one PC to be used as the dedicated PC for that account. DX9WARE makes use of a HWID (Hardware ID) for that dedicated PC and ties this to your account. If you try and login from another device, you will receive an error:

You can 'clear' your HWID to login on a new device once every 7 days through the dashboard
What's a Hardware ID?​
Your DX9WARE HWID is your unique license to the software & is used for whitelisting purposes. It consists of information from your system & Windows install.
The HWID changes when adding/removing computer parts & upon every operating system reset.