@tehn perhaps can confirm, but AFAIK: using SYSTEM > UPDATE requires an internet connection. that would be good to fix first if possible. wired USB->ethernet adapter is an option.
whatever process you used there (i assume it was via thumb drive and the serial shell? please confirm this), you should be able to repeat the same steps with the 190422 update, even if you can’t get the norns online.
[edit]: woops; for the benefit of future readers, i was wrong about this. i forgot that pre-2.0, the SYSTEM > UPDATE command would attempt to search the filesystem for downloaded update files.
it is important to perform a clean update one way or another, as there are changes to the executables and not just the lua files. from shell, you should be able to see if update.sh completes.
once you have a current system, i would recommend simply deleting / moving everything in ~/dust/code and starting over with just the newest version of the scripts you want (from the Library section and the norns tag) note each script’s requirements, if any. you do not necessarily need to install we, but it should not hurt to do so as long as you get the latest version of everything.