Restore last session when application starts: Determines whether documents start automatically with the last viewed session when you launch Foxit PDF Editor. If this option is selected, Foxit PDF Editor will automatically record the opened document and its viewing information (including page number, zoom ratio, etc.) every three minutes or at the time when you close the application, and display the last viewed session recorded when you launch Foxit PDF Editor next time (even when you relaunch Foxit PDF Editor after an unexpected quit).