EnviroInsite2012 is the original version and EnviroInsite2012NET is the Service Pack release. I set it up that way so that people could keep the old version (EnviroInsite2012), while they gained confidence with the new Service Pack (EnviroInsite2012NET). You’ll notice that the start programs menu will also list both choices. Make sure you select the correct one. You can uninstall EnviroInsite2012 when you feel you no longer need it.