Just for others that run into a similar problem (on ChromeOS or not, because I had a similar problem on my Linux desktop), the issue of something like Audacious or something else opening when you pick this menu item from Sublimeâs menu is caused by the fact that the appâs desktop file indicates that it handles the inode/directory filetype.
You can confirm if something is awry by using xdg-mime query default inode/directory to see what application is used by default to open folders, to see if this is the issue. If you donât see something that is supposed to open folders (e.g. Nautilus or Thunar), this is the problem.
If so, you can use xdg-mime default SOMETHING inode/directory to change the default application (replace the SOMETHING as appropriate).
Note that the above assumes that whatever window manager you use doesnât have a more direct configuration method for this.