In DATA|SUITE in the menu bar there is the menu point Tools. Those features can only be used with an IMPORT|IT license.
You can delete activities with IMPORT|IT Advanced (see IMPORT|IT Editions).
A schema settings report can be created from the Basic version on (see IMPORT|IT Editions).
You merge Act! databases with IMPORT|IT Ultimate (see IMPORT|IT Editions).
You can delete custom tables with IMPORT|IT Advanced (see IMPORT|IT Editions).
CSV files can be joined with IMPORT|IT Advanced (see IMPORT|IT Editions).