How do I disconnect or manage Collage.com on my Facebook and Instagram accounts?

Facebook

First click the down arrow to the right of the icons at the top of the page. 

Next, click "Settings."

Then click "Apps" in the lefthand menu. 

To remove Collage.com, click the X next to the app.

Instagram

First go to Edit Profile in your Instagram account.

Next go to Manage Applications. Find Collage.com and hit the 'Revoke Access' button on the right.