This may help == switch to the All Books VL (IIRC you can't not have one), click the Configuration button in the Tag Browser, then select Sort by->Number of books.
The Miscellaneous->Clear the virtual library shortcut will get you to the All Books VL. It defaults to Ctrl+Esc. On Windows 10 (not sure about 7) Ctrl+Esc opens the Start menu, so I changed Clear the virtual library to Ctrl+Alt+↑ (Ctrl+Alt→ and Ctrl+Alt← are Next and Previous VL)
BR
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