I would do the following first...
npm list > npmlist.txt
$ grep 0.19.19 npmlist.txt
To see what versions it returns. If there are still npm packages at v0.19.0 then yes, do the commands that you list above. i.e. remove and install the packages locally (I did it in the .node_red folder). At the time of writing the @latest is 0.26.0.
Please let me know how you got on.
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