How do I change/delete alias in OS X permanently?
I just solved it.
In order to make permanent change to alias, I need to edit a config file.

nano ~/.bash_profile


Than I enter the GNU nano editor window, then I make the change to the line that I want, maybe delete a line or change a line, for example:

alias name='/Applications/FunProfile/GoodProgram'


Then press control+o to save it, next press control+x+enter to exit it.