Looking at your screenshot, the resolution for the receiver is not set correctly for your television.
Skins will be a personal preference. Skins may be downloaded in the plugins menu. I suggest downloading several skins and see what works best for you.
I have spent a good bit of time lately modifying the blindscan plugin. The blindscan will be about the same in every image because the binary file that does the actual scanning Is Not in the blindscan plugin. All the blindscan plugin does is start the blindscan or transponder search, set parameters, and provide a few extra options or features. The binary file for the receiver does the actual scanning, not the blindscan plugin itself.