Solved now. Ran node install, which got the Authoring tool functioning again. Then ran upgrade.js and all upgraded to latest versions. 

Still can't figure out how to access my latest version of node without having to use  . ~/.nvm/nvm.sh - have tried setting default but always reverts to old node version on exit and restart. I think something to do with installing with nvm, but can't figure out how to reset default version.