Resources as HTTPS

Hi, my website shows as being secure but the blog section isn’t. Whynotpadlock shows there are mp3 resources which are all http links, and I don’t know how to change that in Rapidweaver so it uploads the files to the https site. Can anyone give some advice? Thank you.

Here is the whynotpadlock report:

Did you change the website address in the general settings? After changing did you republish all files?