Listen to my music

I am Julien Vallet’s mother and we share our Audirvana license. All my files, for work, family and music are on an external Hard disc, so that I can work and listen to music either on my macbook pro or at home on my Imac. Julien has installed Audirvana on his Imac in Bruxelles. But it seems that I can’t have it on both my computers, which is very frustrating… Can you help me ?
Sincerely yours,