Can't find Basic lands!?

Just installed the most recent version without problems but when I openthe deck editor to create a deck...
basic lands are not displayed. I know there is an old post about this issue but there is no explanation on how to solve it...
Thnx!!!
EDIT: I tested what happened if I opened an existing deck and surprise, it displays basic lands... but I cannot find them in the cards scroll bar...
EDIT 2:
I ponened my new deck and another deck I knew contained Mountains in wordpad, copied the code, name and the quantity and pasted it to my new deck, changed the quantity and when I open it in the Deck editor my new deck shows them, but they still can't be found in the cards scroll bar 





Thnx!!!
EDIT: I tested what happened if I opened an existing deck and surprise, it displays basic lands... but I cannot find them in the cards scroll bar...

EDIT 2:

