Where is the img code for HungryFEED?

So the company that coded my theme for me installed hungryfeed.. but I absolutely struggled to figure out where the images are being called in the code.

Because the amount of code is so big I have pasted it here https://pastebin.com/FFGSEtju. Can anybody help me locate it, please?

All I want to do basically is add a php script to remove “70×50.jpg” from the file name and replace it with “62×428.jpg” as the rss feed does not have access to the bigger images.

Thank you.