Modding a window, cannot completely remove middle

Hi. I'm trying to mod a round window from the Cats & Dogs pack, The Port Hole Pane. I exported the mesh to Blender, and deleted the middle cross-piece. I recolored the window pane so it looks like stained glass (no problems there). When I imported it into S4S, the cross-piece is still there. I tried to edit the texture map of the window frame, and tried deleting the piece I didn't want. That didn't work, I just got a black cross-piece. 

Can someone please help? I'm SO close. I highlighted the problem pieces in pale yellow.

:upset What I ended up with.

Thanks!