Need help with Site Builder

I was one of the ones using the old site builder and it stopped working after building the website for nearly 12 years.  I could not figure out the new software and just do not have any time to figure it out.  It has caused more stress than it is worth to try to bring my old site to this new software.  So I have been editing my site online.  I have 2 websites.  I had updated them both before SiteBuilder quit working.  My main site was up to date on the online editor.  The second website is not, it has very old content as I redesigned the website.  I just need to change one sentence on the page and do not want to have to redo the entire thing again.  Please tell me there is a quick fix to this.