Ok I tryied again and again sometimes and yes it seems working from time to time. I'll make make a shortcut of PdnRepair.exe thanks
The operation is from Paint.Net to a new document Paint.Net (manipulation : select, ctrl C, Ctrl N, Ok, Ctrl A, Suppr (cause white background), Ctrl V then extra white background appears.
Sorry for wrong post my english is not very well so i didn't want losing time in reading rulez. My apologizes for the incovenience. Also I take time to read noobiest guides but with ctrl F on the alpha word i didn't find anything really interresting.
Thanks this worked directly for paste into new picture too. But idk if it's chance or not cause i have the problem from times to times now :s
Yeah I AM, however i know how to search on forums and i only find things about advance uses of the program wich are not the interest i am looking for cause i told you i'm a newbie.