Good afternoon Nick and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the issues you have encountered while trying to upgrade.
I would love to help you with this topic.
When you are facing such issues, there are 2 things you could do:
- Go to http://www.ieee-ukandireland.org/wp-admin/update-core.php and try updating from there
- Simply deactivate and delete the plugin (this will not impact events)
- You should then be able to install the latest version manually.
Let me know how that goes.
Best regards,
Geoff B.