January 3, 2017 Continuous
Since OpenCart v2.3 there is a new folder structure. The 'module' folder is moved to 'extension'.
For instance, catalog/model/module/ will become catalog/model/extension/module/. This has implications for a lot OpenCart extensions. If you have an older (pre v2.3) extension it may not work in v2.3. But there is hope, if you know about this change, extensions can be updated to fit v2.3 as well.
All extensions of Continuous are updated to be compatible with v2.3.