So far I’ve been unable to duplicate the problem with the Gigs Calendar settings page that so many people have reported. If the problem I describe below is the problem that you’re experiencing (and you’re using 0.4.0), leave a comment or send me feedback from the plugin if you’d be willing to help me track down the bug.
The problem that I’ve been hearing is that on upgrading to 0.4.0 or installing it fresh, you save your options. After that, the “Settings” page disappears from the list of tabs from the page. You are unable, even on your main “admin” account to access the settings page. You might be able to create a new administrator account and get to the settings that way, but the main admin account still can’t get to it.