How do I reenable Firefox 16 to use the default profile ?

[XPcentric]

I have two versions of Firefox, the default one is Firefox 16, but I also have Firefox 6. I also have more profiles in Applications Support / Library/ Firefox.


When I want to launch the older version of Firefox (Firefox 6) using the default profile, I edit the file "profiles.ini"

[General]
StartWithLastProfile=1

[Profile0]
Name=default
IsRelative=1
Path=Profiles/8yzcgiz4.default
Default=1

[Profile1]
Name=test
IsRelative=1
Path=Profiles/h03g09lt.test

But this time when I try to revert, Firefox 16 does not pick up the Default profile, its start as if it were just installed with no addons or bookmarks in it. Does it uses a different directory to store the profile or how can I reenable the default profile ?