BB MANAGER EDITING - CAN I ERASE BARS?

[ATTACH=full]6366[/ATTACH] Greetings, I’m trying to edit the chorus of a song I downloaded from the forum…is there any chance I can easily erase the first bar in the edit window?
I couldn’t find a way…Thank you for your help!
To give you an example…I’d like to erase those empty spaces you see in the pic I uploaded.

Probably the easiest way to do this is using a DAW digital audio workstation. Google it for more details.

DAW?..May you tell me what it is?

Digital audio workstation -a program like cubase, Pro tools, Logic Pro x, fruity loops, audacity, etc.