Paid plugins are not listed in WordPress directory so you can upload them via WordPress upload plugin option. First, you need to download the plugin from the source (which will be a zip file). Next, you need to go to WordPress admin area and visit Plugins » Add New page. Then upload plugin & activate it.
admin https://cooltimeline.com/wp-content/uploads/2019/03/cooltimeline-logo.png admin2016-09-16 06:28:292016-09-16 06:28:29Upload a plugin in WordPress