PS3 PS3TrophyIsGood Not a valid TROPTRNS.DAT

[Ilusion]

No. Once syncronized, the timestamp can not be set to a lower value than the last synced one.

Is there any other program I can use that allows me to get trophies before the last synchronization date?

 

[GuilloteTesla]

Is there any other program I can use that allows me to get trophies before the last synchronization date?

There is none because it can't be done. Read again, once syncronized, the timestamp can not be set to a lower value than the last synced one.