Your user name is not in the authorization-server’s database. If you are a paid-up customer, please send email to firstname.lastname@example.org.
Widespread software piracy has made this system necessary.
When you first click the “Graph” button, Fractal Stock Grapher will verify your username with the authorization server at trivisonno.com. This usually takes less than a second.
If you are using a firewall, such as the one built into Windows, you may need to configure it to allow access to trivisonno.com.
If you still have problems, email me the contents of the “auth-debug.txt” file. To find this file, go onto Fractal Stock Grapher’s “Help” menu and then to “Open App Data Folder”. On the Mac, you can just go into your Fractal folder.