Custom folder icon size very small in Directory Opus, looks fine in Windows explorer

Hello,

I'm having an issue where I created a .ico file to use as a custom icon for a folder, and as I adjust the thumbnail size slider, to something greater than 32px, it looks like the custom icon isn't sizing up and just stays at 32px.

The .ico file I made is 256x256 so I was expecting to be able to see the folder icon to be able to scale to at least that size.

Any ideas on if there's something I can do to fix this? When I check windows file explorer, the icon seems to be showing up at the correct scale

Thanks!

Please zip and attach the ico file for us to try with.