When the program is in offline mode, it does not download files from the Internet, even if there are queued files or you browse with the built-in browser.
The mode the program is in is displayed in the title bar of the application.
If the program is online, you can switch it to
offline mode by clicking on the Go Offline button on the
Project Toolbar.
To switch the program back to online mode, click on the
Go Online
button on the Project Toolbar.