Yes,
1) Decrypt the save on your 9.00 first (with PS4 Save Mounter 1.9.3 version by ctn123).
2) Grab the mounted decrypted files to PC. (Nice to keep backups)
3) Then put them on your 5.05 with Save Mounter 1.5 (5.05 only version) ( that's if you can't get 1.9.3=universal fw) to work on 5.05...