For alternative, you can try using Ring Switcher which is CompizConfig plugin, the plugin offer switching windows with Alt + Tab key as default shortcut.
Make sure you have install CompizConfig first, to install, press Ctrl+Alt+T to go to a terminal and type:
sudo apt-get install compizconfig-settings-manager
Open CompizConfig, then select Window Management section on left pane. Search for Ring Switcher and enable it by ticking the checkbox.
NOTE: You might want to disable Super key (the Windows icon) on your keyboard, as the key will trigger unity dash to pop up.
How do I prevent the "Super" button from opening the dash?