How to disable "mailbox" features

[Cerec]

I cannot seem to find a setting to disable the "mailbox" features that Zygor adds. Or, at the very least, I'd like to be able to set it so that the default tab that opens, when I open the mailbox, is NOT the Zygor tabs.

I don't find the mailbox features added by Zygor to be appealing at all.

[ZG Support 1]

That would be the mail tools option in the gold guide section of the guide viewer settings.