welcome to Beoworld.
Your English is very good.
I think that the channel search function always refreshes all TV channels.
On my BV8-32 and when I click:
[DTV]
[MENU]
and choose "SETUP"
"CHANNELS"
"SEARCH"
I get the option to add either "ALL" or only "FREE" channels under a search mode of "AUTOMATIC" or "MANUAL"
If you are talking about the older analogue transmissions:
[TV]
[MENU]
select "TUNING"
and then you can "EDIT" or "ADD" or "AUTO TUNING" or "MANUAL TUNING"
The one thing I did not understand, was how you downloaded BV8-40 software from the B&O internet site ?
First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*