Thanks for the offer.

Here is a link to a copy of Nuages, which crashes (my copy of) BIAB 2017 Audiophile for Mac every time:

https://www.dropbox.com/s/aljt6pbxfbnmnyc/Nuages%20%28Django%20Reinhardt%29.Mgu?dl=0

All I have to do is start up BIAB 2017, open the file, and click the Mute button on any one of the instruments.

And here is a link to a copy of "Two Sleepy People", which was put together recently by a friend using an earlier version of BIAB for Windows (2012, if I remember correctly).

https://www.dropbox.com/s/6i8qpkwzt1o5ghs/Two%20Sleepy%20People.MGU?dl=0

As written, it has a tempo of 80 stored in the Tempo field of the Print dialogue, but when I view it in this dialogue with BIAB 2017 the "8" is missing, leaving a tempo of "0"!

I've tried opening and re-saving in a Windows 2014 version, which doesn't resolve this problem, although when I compare hex-dumps of the two files there are very substantial differences.

I have dozens, perhaps more than a hundred, files which have a similar problem affecting the composer etc fields, but I think this one should demonstrate the principle.