Can I remove a campaign after it is launched?

Yes you can! As an admin, you can make your campaign inactive. To do that, just click on the campaign and switch the green button Active to Inactive. If you are sure you do not want it anymore, you can also archive it as shown below.
 
​

​​

However, we advise you to not do this often, especially when the campaign has been out for a while. Users can get confused or frustrated if they won points.