If you unfortunately no longer want to use timeghost, you can revoke the permissions (for optimal use of the application) you gave us at the start. 


In order to do that, you first have to click on your profile picture in the upper right-hand corner:




Then you have to go to Manage your Office Profile:




In the navigation on the left side you can find all your App Permissions and you can revoke them by clicking on the garbage icon Revoke and confirming your choice. 




Alternatively you can also find all your Office 365 apps here: My Apps (microsoft.com)