license for updating visual composer

Bougnt a new license today of WPBakery Page Builder plugin because my WP Bakery Visual Composer needed update so I could create and change my webpages.

tried to update the plugin of VCompser I have installed, it says I dont have a package available for installation. It indicates I should "activate my VComposer license but when I click there’s no license number available or a field to include my Purchase Code number…

Tried also to upload the plugin I bought using the ZIP file but when I activate it it shows an error because the former plugin is activated. When I deactivate the oldest and activate the new, all my webpages go blank and with no information. Had to UNDO this procedure, but need to update and have WPBakery Visual Composer working…

Can anyone here help me? I’m going nuts cause I need to update my site urgently and bought something that isn’t helping me to solve this situation at all…

Thanks
Ana