The History tab displays the last 500 torrents matched. Entries can be manually deleted by use of the Delete button at the bottom, or by pressing Delete on the keyboard. Note that left-clicking on a column will sort the items in the list by that column, alternating between ascending and descending sort for each additional click. You can select what columns you wish to see by right-clicking the column headers. If you wish to reset all changes you've made to the columns, you can select "Reset" in that context menu. The following is a description of each column:

Context Menu