Help with Flickr update to HTTPS

I am looking for some advice on my website. I got an update from Flickr to say that Flickr API going to SSL. I use flickr to pull photos to my website using the photoset code in Flickr but it has stopped working since 27th June. Flickr sent me the following message:

https://help.yahoo.com/kb/index?page=content&id=SLN24319&locale=en_US&i=8L/N8o+wVslquLP60+kCtA==

I didn’t create my website ( playpiepint.com ) but have been left to run the site without any help or contact with the person who did create it. I know the basics of maintaining the site but I am a bit of a novice. I understand that I might need to go into the Flickr plug-in section of wordpress and change something but I am not really sure where to start. Any advice at all would be much appreciated.