Hello susy,
Thanks for contacting us!
As with any plugin, theme or core update, it is always best to have a relevant standby and a sql backup of your database before beginning. Please make sure you have a recent backup of your site before you start! I’m assuming nothing bad will happen, but better to be safe than sorry. (It can save you a lot of pain in the long run if you adopt this best practice)
Since you are a licensed member, if you add you license to the Events > Settings > License tab in you WP-Admin, you will be able to update directly from our server! This is typically the easiest and fastest. No need to download anything!
If you download it separately, you can FTP into you site’s server. Delete the old PRO folder at /wp-content/plugins/events-pro/ and add your new one in it’s place.
Does this make sense? Let me know if this doesn’t work for you.
Cheers!
– Casey Driscoll