This was an issue in past Adobe Reader programs where you had to go through option menus to permanently hide the side Tool bar (currently the one that pops up on the left), but there were workable solutions to fix this.

With the latest Adobe Reader update 20360 the tool bar has returned. I tried the old way to remove it by selecting in the preferences to "Remember Current State of Tools Pane". Unfortunately this is not working this time.

How can users permanently remove this?