For Mac users:

  1. Right-click on the join.collab file.
  2. Choose Get Info.
  3. Set Open With to Blackboard Collaborate Launcher.
  4. Click Change All to always open .collab files with the Blackboard Collaborate Launcher.


For PC users:

  1. Right-click on the join.collab file.
  2. Choose Open with > Choose default program.
  3. Select Blackboard Collaborate Launcher as the default.
  4. Select the Always use the selected program to open this kind of file check box and then click OK.