Thanks for testing Chris. As far as I can tell from your screenshots, the application looks the same on your hi-res screen as it does on mine, so that appears to be finally fixed. I've seen screenshots other users have posted before this update, and you're right, the text was all messed up and nearly unusable. It's shameful that this problem took so many years to resolve. I am extremely grateful to you for taking it upon yourself to work on this, for the benefit of everyone. I see from your commits on GitHub that you started tinkering a year ago this month! I know you must have spent a great deal of time and effort; just getting Qt going is a major undertaking.
I feel confident enough in these alterations now that I've accepted your pull request and the changes have been merged into the source repo.
I've also created an official new release (numbered 0.94 as you suggested), and it is posted to the Downloads page or available for updating within any prior version of OP Config.
Once again thanks for all your help. If you come across anything else that needs attention, just let me know.