Hello MarloweC, we're sorry but can you elaborate what happened? Did you use itch.io Launcher or any other 3rd parties program?
I am using the itch.io client. It's supposed to tell me when there's an update. I'm not sure why it wasn't telling me...
I consult my team and it seems like it's quite common for the client to do something like this. I suggest you manually look for updates on the itch.io page or follow our Twitter for update news.