Here you can find Paint.Net v3.36. The last portable version of this user friendly, freeware image editor for windows.
It has a simple, innovative user interface with elements designed to be immediately intuitive and quickly learnable without assistance. When you work with multiple images, navigation is very simple and fast because of a tabbed document interface and live thumbnail of the images instead of a text description.
Each image can be worked in layers. You may think of them as a stack of transparency slides that, when viewed together at the same time, form one image. Also there is ulimited history recorded in the history window, so if you change your mind you can easily undone or redo any action.
Paint.Net has special effects and powerful tools to help you edit your images and don't forget that there is an Active Online Community which help you solve any problem.
