Hi Rich.
Thanks for your reply.
I used
OO 1.15 (2023-10-12) that you posted on the forum. (I don't know if there is a newer one). Run "oo /B C:\sys\icons\WhiteLightBlue MMFolder" and changed the Class type of the folder to MMFolder.
But it still does not render the .png files as thumbnails to be shown on the desktop.
On the picture (IconFolder.png), the calculator shows the icon, but it is because I saved the file with PMView and I guess it is showing the bitmap icon, not the PNG.
I think that it may be some problem on my WPS, after a reboot, it shows the first icons and not the rest (MMPNGIcons.png)
All the files (PNG files) on the folder are using the MMPNG class.
Regards