Hi,
Thanks for reaching out to us! I’d be happy to help you 🙂
Next time your web developer needs to customize our plugin, you may refer him to our Themer’s Guide, which has some useful resources on how to proceed (with an emphasis on customizing our plugin within a child theme)
That said, you should be able to download Events Calendar PRO 4.4.24 from My Account > Downloads.
Please tell me if you can’t get the plugin from this page, in which case I could send a copy via email.
Cheers,
Jeremy