[Plugin: Add Local Avatar] Local Avatars – doesn’t work

Good day!
I have a little problem with Local Avatars!

It works fine on developer server but not on main server.
It’s probably becouse of ftp upload blocked on main (plugins I install manually, however photos to posts and gallery works via upload from CMS..).

Here is my question:

Do anyone know, where avatars are stored on server? If I’ll knew that, I could upload it manually and add a path to it via Users->Avatars -> Local(path).

Regards,
Domin