This has been asked about a few times and was posted as a feature request, but it seems the implementation was the ability to add the section to the ini file, which does not work for me, and I'm not the only one. It would be great if this were worked into the Preferences GUI.
FYI, I'm using 4.54 64bit.

https://irfanview-forum.de/showthread.php?t=270
https://irfanview-forum.de/showthread.php?t=9754
https://irfanview-forum.de/showthread.php?t=7018