pamhyr: Fix save after backup and minor change.

src/Solver/Mage.py

@@ -672,6 +672,7 @@ class Mage(CommandLineSolver):
 
         self._export_ST(study, repertory, qlog, name=name)
         self.export_additional_files(study, repertory, qlog, name=name)
+        self.export_study_description(study, repertory, qlog, name=name)
 
         return True
 
@@ -891,6 +892,7 @@ class Mage8(Mage):
             study, repertory, qlog, name=name
         )
 
+        self.export_study_description(study, repertory, qlog, name=name)
         self._export_REP(study, repertory, files, qlog, name=name)
 
         return True