As of v. 7.8, Logos Bible Software supports reopening closed tabs both via panel menus and keyboard shortcuts (PC: Ctrl + Shift + T, Mac: Cmd + Shift + T). Conveniently at least for PC users—and I suspect also for Mac (?), the keyboard shortcut is the same one that will revive tabs in major browsers like Google Chrome.
For additional details and a walk through of how to access this feature through the panel menu see the LogosTalk blog.