From many years of poorly understanding French, I think this is a question about purchasing BIAB, downloading the installer, and not receiving the full program. I think the question also asks if there is a better way to contact PG Music. From other posts by this user, this topic is about a Windows computer but this user is very experienced with BIAB on the Mac.

You can contact Support in one of several ways:

Try the Live Chat, which is that blue bubble on the lower right of your screen (if they are waiting online).

Or click on The Support column header, in the third row down on your screen, the blue row.

There is also a French language forum for BIAB, here: https://www.pgmusic.com/forums/ubbthreads.php?ubb=postlist&Board=15&page=1

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.