I'm having trouble figuring out how to install BlueGriffon. All the other programs I've installed have been easily found in the Software Center or were a .deb that opened into the Software Center, but BlueGriffon's download is a .tar.bz2 and I tried to look for information on how to use that but it was all outdated and didn't help.
So if possible could anyone please just give me a walk-through on how to install this and get it running? Thank you for your time.
/edit: ran ls ~/Downloads/bluegriffon
and this resulted: