That's the problem with NanoFXv2, the systems that are present are hardcoded into the menu.
There is a so called "fix", which basicly hard codes a lot more system in it, without doing anything smart, and even includes 2 systems that need special attention (but doesn't provide). So I won't point you to that. And don't bother looking for it.
I suppose your only option is to check out Galaxy Charts (recently released).
I think, from a quick glance at the code, it contains all systems. Not sure unfortunatly.