No need to install, just decompress your downloaded zip/tar package.
If what you used is Ubuntu and its version is Saucy (13.10), Raring (13.04), Quantal (12.10) or Precise (12.04),
You can search and install aPhoto in USC(Ubuntu Software Center).
Or you can also install it at command line:
sudo apt-get update sudo apt-get install aphoto
sudo snap install aphoto --edgeThe detail refer to snapcraft.io/aphoto