800HD channel search

[silver7]

I'm new with the dreambox. a dumbo compared with many of you here.
I used auto search and lost half my channels.
A friend said you have to press the blue button and use add ons, I have no add ons to be found anywhere there. He has a 500s.
Could someone explain step by step the process with an 800 please?
silver

[Stanman]

Have a look of the how to update channels in my signature.

Also ready made channel lists in the enigma 2 forum