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ImanagerBeCarefullWithInternetExplorerAndPlugins

When downloading iManager plugins with Internet Explorer it is renames it to .zip which then you try to extract (b/c that's what IE does with zip files) and which has a bunch of files inside you shouldn't view normally.

NPM files are zips with a different extension so its holding files you see is normal but you shouldn't extract them.

Try renaming the files back to npm and try to import it directly.