You have already have a schedule, a team drops out, you want to replace that team by a Bye.
Go to Menu > Manage > Brackets/Round-Robins > Round-Robins, select the league, click on Replace a Team/Player.
1. Select the team you want to replace.
2. Click on Replace by a Bye
? Check the box if you also want to replace by a Bye** the matches that the team played before dropping out (If applicable).
** When you choose to also replace all played matches, the scoresheet remains filled with all the stats. The stats remain on the stats page. But the team that is now gone, doesn't appear visually on the list. Single and Team stats remain.
If you actually want to erase all the stats that come with those matches, you need to go to each scoresheet and clear the scoresheet.