Changing from http to https

Hi all. I recently had my site change from http to https. My host installed the ssl certificate for me, but I still have images/files etc pointing from a http url. I added text to my htcaccess per this article: from the advice by Damian.

I then installed the Search and Replace plugin, and first had all wp-content files be replaced from http to https, but I couldn’t see any changes. I then just opted for searching for http to be replaced with https and that hasn’t worked either. Any advice please? My website is here

Thank you!