Links in Workflowy opening in Explorer as opposed to Directory Opus

I think I have all the DO supersedes Explorer switches set.

I am putting links to files and folders in Workflowy to facilitate access. When I click on links to files the files are opened by the appropriate application as expected. When I click on a link to a folder Explorer is the display vehicle as opposed to DO, not expected.

Is there something I am missing?

Thanks.

It depends on how Workflowy is launching the folders. If it explicitly asks for explorer.exe (instead of the default folder handler), then Explorer will still be what opens them.

(If they are opening the folders with ShellExecute(Ex) then they should use a null verb rather than "open" as the verb, which is a somewhat common mistake.)