Images do not show properly after converting from PNG to JPG

I had issues with Smush Pro. Shortly after installing it, the crash happened. I have been playing catch up for 3 days now. The issue could very well be me but the Smush feature was aggravating so I upgraded to the Pro thinking it would speed up the process.

I did not completely think through the potential challenges and set up in my settings to convert my .png images to .jpg in order to reduce the size of those files. What I did not take into consideration, is when that happens - anything using the .png version of the image will no longer have the image. I can't devote a lot of time to this and am open to working with you guys but my time is limited.

Michael