Adding featured image to Events+ template

Hi,

I'm looking to add images to Events+ templates (thumbnail to Archive & featured image to Single Post).

I found the following thread which seemed to do what I want, but when I went to make the suggested to the code, the line numbers don't seem to match, so I'm guessing that this was for an older version of the plug-in.

https://premium.wpmudev.org/forums/topic/inserting-thumbnail-of-events-in-the-events-archive-page#post-259007

Any ideas?

Thanks in advance,

Robert Ford