Darts for Windows can be used for Super League singles. DfW supports teams from 3 to 12 playing best of x number of legs pr. set/match.
To setup Super League teams, we start by adding the team names ann the players to the database. Click this link to learn how to add team names and players to the database.
Press CTRL-P on the keyboard to open the "Add new players and teams" screen.
When we have all the players and team names we need in the database, we can start to setup the Super League teams.
We start by switching the mode to "Super League" (see picture below)

As you can see, the players are now visible on the right side. In my sample I'm going to setup two 8 players team, The Drunken Clam and The Dead Fox. In the picture you can see that the number of players are set to 7. We now need to change this value to 8 to be able to add 8 players to each team.

We can now start to add players to the team. You don't have to set the team name before you start. As soon as the first player has been added to the team, the team name changes to the same team as the first player added.

If you want to change the display name of the team (if the team is for example a "B" team), change the text in the "Display" box.

Example:
Team: The Drunken Clam
Display: The Drunken Clam B

Continue to add the players to the team by draging and dropping or double clicking in the players list until the team is complete.

When the team is complete, click the "Save" icon in the toolbar.

Repeat the steps for the second team.

We now have two teams in the database and are ready to start the match.
Press CTRL-N on the keyboard to start a new match or click the item "New Match" in the "File" menu.

Set the match type to "Super League", set the number of players in the team (8 in this sample) and then set the number of legs in the
set (best of 5 is default). As you probably have noticed, no teams are shown in the list until you set the correct number of players in the team (8).

Select the team for the left side by clicking the team name in the list. Repeat the step for the right side.
Click "Start the match" to continue.

Click "Yes" to continue...

Click the side who starts the match...

The arrow points to the player who starts the first match.