Slider does not show maximum resolution image

Hi team, great theme!

I did try to look up the documentation from the link within the dashboard but the page is blank, so hopefully you can help me here.

The slider images aren’t the ones with the best resolution—Blogaura seems to be taking a lower-res one generated by WordPress, which doesn’t look good on desktop.

For instance, the first image it grabs is https://luciremen.com/wp-content/uploads/GRANDPRO-TENNIS-2.0_e_A_C43930-1024×490.jpg when https://luciremen.com/wp-content/uploads/GRANDPRO-TENNIS-2.0_e_A_C43930.jpg exists.

Can you give me some pointers on how to fix this, please?

Thank you!

The page I need help with: [log in to see the link]