ToxicNutella

By low-resolution, I mean that it's extremely blurry and in extremely bad quality. I need to save as a .png because the background needs to be transparent, and I have tried setting the bit-depth to auto detect, and it's still doing it.

I started the picture itself as 250 x 65 and it saved in a very low resolution.

I'm trying to save a pic for a website, and it needs to be 250 x 65, but when I save it to those dimensions, it saves very blurry and not at ALL in high-resolution. Is there anyway I can fix this?

So, I installed a plugin, and I have the .dll for it, but what do I do with it? Where is the effects folder for paint.net? Also, once I have it in paint.net, how do I use it? I'm kind of a noob, so any help is appreciated. The plugin I have is the "Object Bevel" plugin.