After applying the automatic process (Find Updates), an error cames up, indicating that is necessary turn ON the php parameter "allow_url_fopen".
I contacted my hosting provider to edit my php.ini file, once I have a windows server shared hosting plan. I'm waiting their permission to edit php.ini and I'll try again...
P.S.: If you use Linux Server, create a .htaccess file with the string: php_value allow_url_fopen on, and place it in the root of your web directory.
Before doing it, I strongly recommend you to find more information about the use of .htaccess files.