[Swiss1000]

Because some musicians have lot of songs, the backup restore is not usefull and sometime confusing...
This option is risky if the librairy is not dedicated...

It could be really usefull to have an option "Snchronise with a backup file".
In this case, no questions requierd, the synch is unidirectional from Bachup file TO active librairy.
That option is more faster and avoid risk to clic "remove librairy" using the backup restore procedure.