Decode hints (Tools=>Options=>General and File=>Export=>HTML)
This option allows you to change the way "hints" show in GSAK generated HTML.
If you check this box any cache hints are shown decoded, otherwise, your hints are ROT encoded and a "Decrypt key" is printed so you can manually decode.
The default behaviour for all GSAK Generated HTML (Including split screen) is controlled by this setting from Tools=>Options=>HTML. However, when generating the HTML export you can override this behaviour just for this export.