Here is the solution for How To Update WordPress Plugins Manually. This article is about latest version of WordPress.
Click On The Dashboard, Then Click On The Updates
Just login to your Admin panel of WordPress site. Then Click On Dash board, after that click on Updates on the left side of the page.
Click On Select All Button, Then Update Plugins
Now you need to select plugs to update. Just select plugins one bye one OR if you want select all plugins click on Select all button. If you click Select all button, All plugins Updated at a time.