Oops, thanks for pointing that out. It is supposed to go to a web page, but that isn't implemented in this port, and wouldn't work in Mini vMac anyway. I'll remove that button from the About dialog, and other references. (It may be better not to send users of this freeware version to Data Descriptions' server.)
To be cross platform, Data Desk uses it's own user interface inside of its window on all platforms. The dialogs, menus, and sub windows are very Mac like, but not native.