They have the .deb at the top of their download page, no need to install the PPA repository if you don't want. You can't get any more than "just downloading and double clicking an ~~exe~~ deb" than that on Ubuntu.
I will admit though, I wish there were an easier way to install PPAs.
You don't need a PDF editor to create PDF's, you can print to PDF in any program that can print, including LibreOffice Writer.