Possibility of modifying a component from 3D central and converting into an independant part file?

For an assembly i used a gear model obtained from the 3D content central and worked in SolidWorks 2010. In that model i made some modifications and used that model in the assembly. When opening this assembly model in SolidWorks 2011 in another workstation i was not able to obtain the modifications done. Kindly provide me a guidence to know whether is there any possibity to change model from 3D content central to an independant part file? (Which will allow me to retain the modifications made)

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