Since version 2.5 it's possible to update your Plugins automatically. It's necessary to input your FTP information before you update your Plugin.
It is very popular and an easy process, but I like to upload the newest version via my FTP client. How sure is the use of your FTP login information in your WordPress Admin? If you like to use another way, you can just put a definition of constants in your
define('FTP_HOST', 'ftp://example.de/'); define('FTP_USER', 'example_username'); define('FTP_PASS', 'example_passwort'); define('FTP_SSL', false); //TRUE for SLL-connection
Otherwise you will have the data after the first use in table
options, in field
ftp_credentials. If you don't want to use them, you can delete them directly. That's possible either via mySQL-Tool, like phpMyAdmin, or in WordPress, if you open the preferences in table
options, just use the admin address of your blog and add