Hi Balagoplan.
If you downloaded the plugin, then you have to upload it via the WordPress Plugins page. Click on Plugins in the admin panel on the left. Click on the Upload link in the row of links at the top of the page. Select the ZIP file from your computer and upload it.
When you see the message that the plugin has been installed successfully, click on the link to activate the plugin.
You can also install the bizXpress plugin directly in your WordPress installation. Click on Plugins in the admin panel on the left. Select Add New.
In the search box, type in bizXpress. Click on Install Now, next to the Details link.
That will install the plugin. When that’s done, click on the link to activate the plugin.
If both those methods don’t work for you, the final option is to upload the files to your WP folder at your host.
Unzip the files. Log into your host and go to the FTP option. Or use your own FTP software.
You want to upload the files to wp-content/plugins. Once you’re in the plugins directory, upload the entire folder. If you can’t upload the folder, duplicate one of the existing plugin folders. Rename it to bizxpress. Open the folder and delete ALL of the files inside that folder. Then upload all of the bizxpress files from your computer to the new bizxpress folder. Once they’re all installed, return to your WP admin and activate the plugin.
I hope that helps. If you can’t get the plugin activated with any of the above methods, contact your host’s support and ask them to check if anything is restricted in your setup.
Jeff