SP Pagebuilder 4 - Add on: Slideshow image size

Hi,
My working Homepage on Joomla 3, SP Pagebuiler 3 , unfortunately did not survive the transition and I am now on Joomla 4, SP Pagebuiler 4.07 and re-crafting the Homepage from scratch, but I am having difficulties on finding how to fit the former slides with add-on Slideshow. The slides are 2000 x 600 pixels and it looks as follows correctly:

Now on SP 4.07 with add-on Slideshow it looks like this wrongly stretched and too big (same 2000 x 600 pixels size):

Where do I need to adapt this on SP 4 Slideshow to show as we used to have it ?
Thanks for help!