Hey Katie,
I’m sorry to hear about your troubles here!
There are a few things to note here:
First, The Events Calendar and Events Pro should still appear and work on your site, regardless of whether a license key is valid or not – or even entered in the Licenses options panel.
So I’m curious: do you mean that your page at /events/ is not there anymore, and if you log into your WordPress Admin, you don’t even see the “Events” menu item in the admin sidebar?
Or do you mean that everything Events-related still exists on your site, but you just don’t have a valid license on it anymore?
If you have The Events Calendar and Events PRO installed and activated, but things are not even showing up, then unfortunately that could hint at deeper issues with your site here and I would not advise you to buy a new license for Events PRO until we help sort some of these things out.
Let us know about some of the questions raised in my reply here, and we can take your issues from there.
Thanks Katie!
George