Sorry for the late reply because I reckon I will just use it as it is, but to really let you know the issue.
On the Settings page->Catalog Price Display->Show Catalog Discount Price Crossout, isn’t this supposed to not show crossout price on the Catalog list of Products page?
So the issue is:
When I turn it OFF, on the catalog page I still see the crossout price except on the Cart item page which doesn’t show the crossout price.
When I turn it ON, the Cart item page will show the crossout price now, but nonetheless, the catalog page will still show the crossout price.
So either ON/OFF, it doesn’t affect or hide the crossout price in the catalog page at all.
If this is how its suppose to work, then the title in the Settings page should be “Show Cart Discount Price Crossout” instead of “Show Catalog Discount Price Crossout”.
Sorry hope I explain this well.