Open the upload from Stock Upload History and click Undo this upload, then confirm Undo this upload? Inverse stock movements will be written to restore the previous levels. The $1.75 fee is not refunded. Sprwt then:

• restores every affected Quantity Needed to the value it had before the run;
• if the run deducted stock, writes an Add movement per row with the reason Void so on-hand stock returns to its previous level (nothing is deleted, so the audit trail stays intact);
• creates a new history line of mode Reversal with a $0 fee and marks the original as Reversed.

Only a run that was applied and not yet reversed can be undone (That upload has already been reversed. / A reversal cannot itself be reversed.), and you need Edit Retail Menus. Manual stock movements entered the same day are not touched because each movement is tagged with the upload that created it.