Only Takeaway showing on the main screen

This can be one of a couple of things.

Either the option in the security section of option is set to something other than "Delivery & Takeaway" or there is no customers file.

If you check the option in the security section of options in 2 at the bottom right you should see the following screen.

Anything other than the top choice (Delivery & Takeaway) will get rid of Delivery. Assign to Driver and Payment by Driver.

If this is OK the problem may be to do with the customer file. It can either be corrupt or has been damaged and is empty. 

Try replacing it from either last nights backup or one of the older ones if that has the same problem.