This update is a security fix and is recommended to all users. Thnanks to Mike Fara for the report.
Thanks to Chris D and Kier for making this possible, the Chunked Upload capability will be officialy supported in XenForo 2.4 and this addon will be no longer needed. For anyone who wants to use it or as an archive, I'll make it available for free but unmaintainted. If you're an existing customer I will be providing support for the time being in my website (https://meta-data.dev/).