I removed all the files except the config.php and uploaded the files of new version.
After that, I entered the URL, a script executed and returned no error.
Then, when I try to login, it returns Access Denied but when I reload the page, I am loged in and into the page. Also, when I try to open the settings menu, it returns this error: "Base table or view not found: 1146 Table 'goffice01.ta_tasklists' doesn't exist"
and when I tried to install it on another URL it returned error on PHP version. It says it requires at least PHP 5.3 and the PHP on that server is PHP 5.3.x