For Mac users:
- Right-click on the join.collab file.
- Choose Get Info.
- Set Open With to Blackboard Collaborate Launcher.
- Click Change All to always open .collab files with the Blackboard Collaborate Launcher.
For PC users:
- Right-click on the join.collab file.
- Choose Open with > Choose default program.
- Select Blackboard Collaborate Launcher as the default.
- Select the Always use the selected program to open this kind of file check box and then click OK.