Re: What are the different xml files in smartconnector_home/current/user/agent
1) *.xml files are Destination specific files that contain Destination specific settings like for example Cache, Filter Out, Aggregation and so on.
2) In agent.properties for each destination your can find something like this:
so this "3Zv91A2ABABCsgHA5gXHDAg" will correspond to xml file that you have and in it there are Destination specific settings.
3) This file is created/modified automatically and each time you reregister the new *.xml file will be created so after some time you will have few *.xml files that are not used. You can always check in agent.properties which *.xml files are in use.