The addon exports individual objects with whatever settings you enabled per object. So each object will have its own file, its own format and with own file name etc.
Lets say you enabled export for 100 objects, and each has its own formats like .obj, .fbx, custom+object based naming etc The add-on respects those settings during export, including resetting the location prior to export. These properties are set once per object in the scene, these settings are saved with the .blend file.
It does not merge objects since it is intended for exporting out individual items. However
Collection support is in the works.