Calibre can't see new Kobo Clara BW

I have an existing Kobo Clara 2E and use Calibre. Currently running Calibre 7.7.

I have bought a Kobo Clara BW for my daughter, when I connect the BW to my computer Calibre does not show the "Send books to Device" icon.

I need to be able to load books onto my Clara 2E AND the Clara BW.

Please help and explain like I'm 5 what I should do.

Thank you so much for the help.