I updated to the latest version of Hook (1.3.1 (2892)), and found this:
When I chose “Hide status bar” from that cog wheel it did indeed hide it, but now there’s no option to get the status bar back as the cog wheel is gone.
And I can’t find the option to get it back anywhere else in the preferences, or by using ctrl-T…
Restarting Hook did not fix this.
Se also Missing linking/copying options - Bug Reports - Hook Productivity Forum, as they may be related.