Cinema 4D Exchange plugin doesn't work

[Anonymous]

Hi, after seeing the power of the Cinema 4D Exchange Plugin in a Cineversity video I decided to give it a try.
https://www.cineversity.com/vidplaylist/archicad_to_cinema_4d/archicad_to_cinema_4d_part_04

In Archicad I go in Design > Extra Design > Cinema 4D Exchange > Create new element in Cinema 4D

Unfortunately nothing happens, while I expect Cinema4D to open right away.
The other part of the plugin, that allows to update the model imported in Cinema4d works as expected.

The documentation I found says: "ARCHICAD will ask you to locate CINEMA 4D Exchange manually the first time you use it."
It's pretty clear: I should pick the cinema 4d plugin I just installed, but it can't be selected. The app of Cinema4D, instead, can be selected, so I choose that. Unfortunately, as above mentioned nothing happens.
I think that could be the problem.

I'm running Archicad 20 with an educational license.

Documentation: http://helpcenter.graphisoft.com/guides/cinema-4d-exchange/usage_scenario_3_bidirectional_free-form_modeling/

Thanks