[Resolved] Customizing the "You need to login to view this content…" Snippet

I’m trying to figure out how to change the following text, which is a default entry when installing Simple Membership Plugin:

You need to login to view this content. Please Login. Not a Member? Join Us

I was able to locate this text in one of the plugin’s deep root files, but when I changed it, it didn’t stick so I am guessing I was in the wrong area.

One of the reasons I would like to change it is the styling of the sentence doesn’t match the site’s design, as the sentence is pushed all the way over to the left side of the internet browser; none of the site’s pages have text there so this is unsightly. If I could adjust that styling, that would be great. I could also modify the text a little, although it’s fine as it is.

Any help would be appreciated. Thanks!