StOMP supports renamed class loading via simple API.
Suppose you have renamed YourOldClass to YourClass.
If you read the old serialized data based on the old class name, you can:
Object fromStomp: bytes setting: [:context |
context registerClassOldName: #YourOldClass for: YourClass ].
Object fromStomp: bytes setting: [:context |
context registerClassOldName: #YourOldClass in: #OldNameSpace for: YourClass ].
There is also a NameSpace conscious version.