Codex Desktop Windows right side panel

I am intensively working with Codex DW and I am very satisfied. However, there is an annoying feature that came with the last build release (a few days ago): when the panel on the right is closed, if one tries to click on the upper arrow of the thread-window to scroll backward, a pop up will project to the left from that right side panel and will cover the scrolling arrow. To avoit this, there is apparently only one possibility: let the right side pane open. But this, in turn, eats a portion of the computer screen. Is there any other solution ? The best would be to disable entirely the right side pane, since it is mostly useless. Thanks for suggestions.