Denied Superuser access in Fairphone OS. How do I get it back?

Superuser Access is needed in order to let the Fairphone 1 work properly. In case you denied Superuser access during installation, there is an easy way to get it up and running again.

Step 1
Go to Settings → Superusers. A list of denied apps will be shown

Step 2:
Select the Fairphone OS:

Step 3:
Select the "trash bin" icon at the bottom right corner.

Step 4:
Go one step back. Now it will get to the Superuser request screen. Select ‘Remember choice forever’ and ‘Allow’

You are done!