Recently, 2 weeks or so, Dopus has started changing filename display to Uppercase. It displays normally for 30 seconds or so and then changes.
I am on Windows 10 version 20H2 (OS Build 19042.630)
Dopus version 12.22 x64
As a side note I found this was a problem years ago with Display Fusion. I do use DF. Though I can exit DF before I launch Dopus for the first time though the problem persists.
Then run the installer, over the top of your existing install. (There's no need to uninstall first, and doing so would wipe your config, so don't do that.)
Once that is finished, please reboot and see if the problem still happens.