Isn’t it a nice idea to hide an update button by changing it to link which isn’t even underlined?
Definitely not!
So if you have updated your Typo3 to version 6.x and miss the update button for your extension list, just move your mouse over the “last update” info in the upper right corner of your “Get Extensions” tab. You will notice your cursor changes to a finger and your able to click it for an update… not comments …
Typo3 6.0.2 Update Extension List