Go to streber\pages\login.inc.php and edit the lines:
$g_tabs_login= array(
.....
'tooltip'=>__('Go to your home. Alt-h / Option-h'),
.....
'tooltip'=>__('Your projects. Alt-P / Option-P'),
....
Change these to something like:
$g_tabs_login= array(
.....
'tooltip'=>__('Login'),
.....
'tooltip'=>__('Streber GNU License'),
....