Hi there,
as in v3, there's no longer a way to use application associations, I would prefer that you help the users to "locate the folder that has the application data in it ", as you write in the blog entry. At least in my case, I find it difficult to look for where an application has its data.
So my suggestion is that, if you drag and drop an application onto the menubar icon (as you would do to encrypt a regular folder), you should offer to encrypt the application's data folder. Optionally followed by the prompt that it could lead to problems when the application's folder is located in the library folder. Of course this requires the here mentioned override (viewtopic.php?f=12&t=583) to be available.
Thanks
Regards,
Michael