Can I use Edge Code to modify my outdated FreeBsd site?  I have Edge Code installed on a Mac.

You can edit the source code to any website using Edge Code as long as the source files are accessible locally on your computer.  So if the website lives on your FreeBsd server, you'll need to copy them onto your Mac first before you can open them, then upload them back to have your changes reflected on the live site.  Extensions like FTP Sync can help with this, or you can do it manually.

Hope that helps!

- Peter