Save files invisible

Hello, I just bought Aseprite on Steam. I tried to save my files in my desktop and other places but the file don´t appear, I don´t see any thumbnail. I tried using other formats like jpeg or png but it don’t work. When I tried create folders using aseprite, the folder don’t appear.
In the home page of Aseprite, the file appears in recent files and I can open it.
I’m using Windows 10.
Is there something to fix it?