Stretching in ProStructures (ProSteel) on MicroStation

Hello,

 is it possible to stretch members of the structure in ProStructures (ProSteel) on MicroStation, without loosing its relations.

 

For example in a pic above, I have a frame, and need to stretch columns 1 meter up, so that the beam will lift up as well. Is it possible to do some how?

If I convert model to MicroStation objects I can use a Stretch tool of MicroStation, but this is not an option...

 

Thanks in advance.

Regards

Liudas