Mac OS X 10.10 Yosemite Changing File Associations not working [closed]
Doing a right-click "Open With" does not make any persistent change to the file associations (actually, it's called the Launch Services settings in OS X).
What you need to fo is "Get Info" on the file (either from the right-click context menu, or by selecting the file and choosing File > Get Info from the menu bar), changing the setting in the "Open with" section of the Info window, and then clicking "Change All" below that.