I've downloaded Aptana Studio 3 from their site and installed it successfully. Now it is showing in the Dash search. Problem is that, when I right click on any file (i.e HTML, CSS, PHP etc.), the Apatana Studio is not in the "Open With" list. Even it is not available in the "Other Applications" list.
How can I get Aptana Studio 3 in the "Open With" list?