1.2.0-rc5: doesn't add instrument to B+BL

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Hi all.
I've just installe v1.2.0-rc5 64bit on my Win7 machine.
Any brand new project has a "kicker" instrument into the B+BL editor.
If I add a new instrument (sf2 player in my case) into the song editor it doesn't show up into the b+BL editor just like I've seen so far.
So I am not able to create a track with the B+BL editor with that instrument. Just the kicker.
Is this a bug or is it just me missing something (new) ?

TALIA!
I think you're missing something.

If you want you can delete the kicker form the bbe.

You can also just drag an instrument into the bbe.

That works for me on Linux with RC5.

Double clicking on an instrument no longer seems to work. ( for adding it to the song editor or the bbe)