How to open on single mouse click [duplicate]

Somehow I changed the setting from the default double click to single click which makes the right click open the file when I want the right click menu. So I need to know where I did it so I can reverse it.

I've spent the whole night trying to remember how I did it, Please help, Thanks

The setting altered both sides, Solved thanks guys!

Solution 1:

Open Folders

Click on files on the top Ubuntu bar, and choose Preferences.

Click on the Behavior tab, and change the behavior .

If its the right click that you changed, you probably changed the mouse to left handed. If that's the case, then open dconf editor. If its not installed then, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:

sudo apt-get install dconf-tools

Solution 2:

Open any folder, go to edit, then preferences. Open second tab (behavior?) and there is the setting you want.