We have released ‘Load Them All’ v3.3 for QGIS

Changes in this version: Support JP2, KMZ, ERS, and SID files. Use addTabifiedDockWidget to show LoadThemAll panel on top of others. Add support for loading only geometryless layers (using GeometryFilter). Additionally, this version includes a new contributor: Guillaume Lostis. More details of the plugin at https://github.com/gacarrillor/loadthemall