I 2 had the problem with the jpeg export. not sure how to fix that.
but if it would help, export as an html, enlarge the size of the pic through the dialog that appears (10x 12 for example).
you should have an html page with a huge picture.
you then can take the picture and right click on it to save another jpeg.
this is actually a jpeg inside of a web page.
also, secondly
when you choose to export html, a jpeg is automatically generated and placed in the output folder.
both ways give you a full result window .