Agisoft Metashape 1.5.0 is a successor of Agisoft PhotoScan application and the updates from PhotoScan to Metashape are free for the PhotoScan license owners, providing that the same edition (Standard or Professional) of the application is used. 

It means that Metashape 1.5.0 can be considered as PhotoScan 1.5.0 version and no additional upgrade fees would be charged.