There are three frames on the main screen. The top frame is function buttons, left frame is domain tree, right frame is content form.
The buttons from left to right are:
Start DNSD: Start DNS server to listen on 53 port and load domain data ( .DM files ) to service.
Stop DNSD: Stop DNS server.
New Domain: Create a domain SOA record manually.
Wizard: Simply create a domain for one IP address. (recommended)
Diagnose: Diagnose a domain status.