Omg, what a mess! 
I feel your pain, @trafalgarlaw , having now opened the flow in KNIME AP 4.7.8.
Long story short⌠it was soon clear to me that describing all the necessary replacements was going to be far too involved, and you are correct that the new Joiner nodes when ported back to 4.7.8 from 5.3.3 wonât even let you open the config. I hadnât realised that this would be the case, assuming that if they werenât seen as âmissingâ then they would at least be configurable, but sadly not.
So I ported it myself with all the necessary node replacements and required reconfig. Please download the version created for 4.7.8 (which will also work in 5.x) uploaded here:
I hope that now works for you. 
