Error with Paint.net

When I try to edit a. DDS with paint.net, saving it crashes
Why?

Maybe I do something wrong?

I try to "save" and "save as" ..........and i get crash T_T
Please help me

well I done a google search on the error for you and this is what i found. BTW wrong section. Should of been in General

1. Press Windows key + R ("Run" dialog)

2. Type %LOCALAPPDATA% and then press OK

3. Find the Paint.NET folder

4. Rename/delete it.

If there is not Paint.NET folder at step 3, then your hard drive is corrupt. You'll have to go get it fixed. Paint.NET just can't work around a busted hard drive or corrupt file system.