So Nexus 2 was loading and not finding any content at all! Once I had uninstalled Nexus 1.4 and installed Nexus 2, I noticed that 1.4 had left a string in the registry pointing Nexus 2 to my downloads folder, in search of content which wasn’t there. Nexus 2 was scanning my computer, finding 0testtone.nxs and assuming that this was the main Nexus Content folder, which meant it wasn’t importing any of the mega sounds and presets I had sitting in my VST plugin folder. When I uninstalled Nexus 1.4 before trying Nexus 2, I failed to remove the 0testtone.nxs file as it was sitting in my downloads folder. to cut a long story short, I had to manually download the 0testtone.nxs for Nexus 1.4 to work. I had used the Nexus 1.4 demo for a while and had problems with that too. Which are the actual synth presets (Mega Saw, Epic Trance Lead etc) The important part to note here is that what Nexus 2 is actually searching for is any.
When Nexus 2 first starts it searches your system for the Nexus Content folder, once found it will import all of the sounds, settings and presets etc from this folder. Having problems loading the Nexus Content into Nexus 2? Well I had the same problem, and it took me 3 days of head scratching to come to what was, typically, a really simple solution.