I want to update my Chrome version but I can't find the update button in the menus. Where is it?
If you go to the About Google Chrome menu, it'll show you the status of updates. It'll either be checking at the moment …
… or it could be finished downloading:
Should an update be available, it will be indicated in the tools/wrench menu.
You can go to "About Google Chrome" in the menu on the right, or just visit the page