I upgraded to 2.4 from 1.6.8 and had a few other issues. I just tried to install Low NoSpam and discovered there was no third_party directory in the system folder, so I created one. I set permissions at 777 to that folder and the low_nospam folder and all its contents (not knowing what else to do), but Low NoSpam doesn’t show up under Extensions as it should. Any ideas how to fix this?