bbPress.org

Hello.

I have a problem with the bbpress sidebar. I use bbpress wp tweaks to create a widget area for bbpress. Thats ok.
But: When i create a forum mainpage i dont have a chance to use this sidebar. I only have the choice to use sidebar left and right, but that would show the blogsidebar.
What can i do to use the widget area for bbpress on sites. Link: https://myblender.de/blendtec-forum/