GK New Show Pro - Images scaling down and then up again

I'm not really quite sure why this should be happening but it appears that the original featured image is somehow scaled down to 160x120 and then back up again....and so the image quality of the thumbnail displayed is very poor.

Is there a setting somewhere to stop this from happening....?

Site: homepage on http://accabetta.com/

Many thanks...

Hi,

Images from GK News Show Pro are responsive (they adapt to the container, depend also on the screen size). You have to choose the best size in GK News Show Pro widget options, now dimensions 160x120 are set, so images are stretched, set image size around 293x220px.

Thanks Piotr. I thought I'd tried that already, but apparently not as it appears to work fine now!