Hello I just tested. I use Fira code font. even I changed it to Consolas or Courier New, no clear type was activated. Can you please test it with 5.5.1 (32b) from PSpad developer forum?
For test unzip it somewhere out of program files and run PSPad.exe from this folder. PSpad will behave as portable and all settings will be stored into files in this folder. -- <https://forum.pspad.com/read.php?2,78542,78585> PSPad freeware editor https://www.pspad.com