There are two commands in the drop-down menu of Primary Console Menu Bar->File for managing audits:
Save Audits...: This command is available if and only if there is at least one audit that is in memory which has not been saved to a file. Multiple audits can be selected in the menu popped up by this command with Left , Ctrl-Left , and Shift-Left . See here for details.
Delete Audits...: This command is available if and only if there is at least one audit in memory. The menu for selecting audits to delete supports multiple selections in the same way as Save Audits... does. If a selected audit does not have any corresponding audit script saved to a file, Argos will ask you if you would like to save it first in a file before purging it from memory.