My file previews won't load and some of the backgrounds are black instead of white or transparent.

[MarcGad]

Basically, I use an app called "Paint.Net" to create photos. Whenever I try to open a file on there or send a file to someone on discord, the background turns black for PNG files, and it doesn't give me a preview for PDN Files. Both in files app, paint.net, and discord. Here are a few photos. Also, how do I permanently keep "Large Imagines" for previews? instead of always having to change to large from details.

 

[banhien]

@MarcGad 

You have to associate file type with default apps by file type on your machine

          https://support.microsoft.com/en-us/windows/change-default-programs-in-windows-10-e5d82cad-17d1-c53b...

For example I use .png files for IrfanView software

  

and when view I can see

  

You can pick the right apps on your computer to associate file type.

Regards.