I've spotted a bug in the columns selection menu, using Logos Bible Software 4.2a SR-1 (4.21.5.0790) on Mac.
It is very minor (admittedly), but ... still worth reporting.
SUMMARY
Columns selection menu is not updated correctly when switching between window and reading views.
HOW TO REPRODUCE
1. Open NIV in window mode. Select 2 columns display.
2. Switch to Reading View. Notice that the selection from window mode is displayed (2 columns) whatever your selection for Reading View mode was previously. Select 3 columns display.
3. Switch back to window mode. Look into the columns selection menu, 3 columns is highlighted instead of 2 columns.
-> BUG: The menu selection is not refreshed properly when switching between window and fullscreen mode.
-> HINT: The menu is properly refreshed when switching to another resource tab and back.