After matches have been generated, you can edit the length of matches in bulk if needed.
IMPORTANT - This must be done prior to the matches being scheduled.
1. From your dashboard click open the "Scheduling" module and click on "Events".
2. Click on the on the name of the "Event".
3. Click on "Current Schedule".
4. Click on "Match List".
5. Scroll down and check the box next to any matches you want to edit or you can check the box at the top to select all matches on the page.
6. Click on the "Edit Matches" button.
7. Enter in the match duration the desired new length in minutes and click "Save".