During any daily editing session on my Montage M7 I may make many changes to my user performances. These create multiple copies of the same performance with what appears (in Category search) to be the same name. Looking at these via the Data utility page doesn't reveal any way to distinguish which ones can safely be deleted as there's no visible time stamp. Are the older copies automatically deleted and if so what is the criteria for when that happens?

Thanks, 

Stuart.