Finally, today, I successfully installed audiolab on several machines (both in latest puredata and plugdata), with latest audiolab uploaded by the author (@solipd)
On my laptop (windows 11 25H2) the problem remains in puredata 0.56.2 (attempts to copy twice the same files). I finally think the glitches encountered are caused by the fact I migrated my home directories to another logical drive (D: instead of C:) and I may have changed some security settings on my computer during the migration : Indeed, C: is NTFS, D: is exFAT
Thanks for your support and sorry for the noise :-)