Thank you for helping! Alas, I tried both commands using “note2” in place of “thinkpro2” and neither one seemed to work! Terminal reported:
defaults delete com.devon-technologies.note2 ColumnPointSize
2015-12-12 17:52:14.559 defaults[1677:1090785]
Domain (com.devon-technologies.note2) not found.
Defaults have not been changed.
Any other ideas? I am trying the “Osaka” tip from earlier in this thread and it’s better than before but this kind of bug is certainly frustrating.
There is no option to set a Column Font or Point Size, only a List View.
defaults delete com.devon-technologies.note2 ListFontName
defaults delete com.devon-technologies.note2 ListPointSize
That worked! Thank you for the clarification and help! 
No problem.
Thanks for the hint regarding the font face.
Restoring it to system default improves the situation definitely.
However I would prefer to turn off this behavior completely because in my opinion it looks worse than before.
It’s not a behavior to turn on or off. It is due to a change in OS X.
After using the terminal instructions above, my font looks too small. How can I increase them in terminal?