List extensions that are opened with a specific application

Question

Is there an easy way to find all the extensions that are opened with a given application?
I'm asking because I have two versions of a software installed (Sublime 2 and 3), and some extensions still open with Sublime 2 because by the time I specified that Sublime 3 was not available. I then have to quit Sublime, change the program that shall be opened by default for this extension and relaunch.

I would like to end this once and for all and change it for every remaining extension. Does anyone know of an easy way to do this? Thank you!

Answer 1

Open the file ~/Library/Preferences/com.apple.LaunchServices/com.apple.launchservices.secure.‌​plist in Xcode. The file contains all the bindings for extensions to applications.

Find/replacing the values did not work for me, since the file was overwritten every time. But you can use Find to get a list of all the extensions that are opened with a particular application and then change it by hand.

Answer 2

If you want all files with a certain extension (not the 1 specific file) to be opened by a certain app, do the following:

1. Right click the file and click Get Info (or highlight file and hit cmd ⌘ + i )
2. Change Open with: to preferred app
3. Click Change All...
4. Click Continue in the confirmation box

Is this what you meant to do? This is different from right clicking a file and choosing the 'Always open with' option. That seems to only apply to the specific file, not all files globally.

You will have to repeat this for each extension.