Profiles Portable <> Local

In an older version (out of PortableApps.com_Suite_Setup_1.5.2_en.exe) of Firefox Portable) I was used to copy from my desktop Firefox the profiles.ini, Profiles\v9must0u.default\prefs.js and Profiles\v9must0u.default\sessionstore.js

However, in the new version (installed via PortableApps.com_Platform_Setup_2.0_Pre-Release_2.1.exe) this doesn't work anymore.

Any ideas how I could proceed to have that compatibility back?

I used the same wow for Thunderbird, but haven't looked into it yet.