You can try the SmartObject Service Tester's Export SmartObjects/Import SmartObjects feature.
Open application %PROGRAMFILES%K2 blackpearlBinSmartObject Service Tester.exe
Export
1) You can export a category of SmartObjects by right clicking on the category in the SmartObject Explorer and selecting Export SmartObjects
2) You can export all the SmartObjects for a specific ServiceInstance by going to Tools - Export SmartObjects
Import
1) Go to Tools - Import SmartObjects
Will that affect my process that using those Smart Object?
and then if i just export it then import it to the new instance (Prod DB)
will the smartobject change the service that he has to the new one? (automatically change service from Dev DB to Prod)
The SmartObject will keep its GUID and SystemName, so the process should still work fine.
When importing the SmartObjects, the application will ask you with which ServiceInstance you want to replace the ServiceInstance that the SmartObjects are mapped to. [Link ServiceInstances] screen.