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Downloads auto-filing
From the app’s Help panel
Downloads auto-filing
Off until you say yes — Home asks once, and Settings → Recording & notes changes it any time. When it's on, Tentaku watches only your Downloads folder and looks only at the names of files you download. A course document whose name matches a class is copied into that class (the download itself stays put) with an ↩ undo; anything unclear shows up on Home for you to pick. Nothing leaves this computer.
Change it anytime in Settings → Recording & notes. A file sorted into the wrong class has a move… menu on its row, and automatic copies show an ↩ undo.
Still stuck? Email [email protected] — include which tab you were on and what you pressed.