In ITunes Store there is a Library Button in the upper right hand corner. Left Click on the down arrow on this button and a drop down menu will appear. Click on the Apps Button which will open your Apps page. On the bottom right hand corner is a button labeled check for updates. Left click on the button.
In your account there is an ITunes Store Button in the upper right hand corner. Left Click on this button to toggle to the Library Button, then follow the instructions above.
try . from view menu > show sidebar ( Ctrl + S ) you will get it at the left hand side , then you will find a list of your library , store and device . in library list you will find Apps and next to it the no. of apps need update , click it and you will find the list of apps and " download all free updates " botton , click it
hope this help you