Demostration version on Ax 2012 VM not going back to Developer mode

Hi My AX 2012 R3 was expired on Dec 2015 and i agreed for demostration mode . I have valid license file that i tried to import but some how the configuration key for development is not showing and i am not able to work on development workSpace. Does any one has any suggestions ?

Thanks

You said that you tried to import a valid license, but you didn’t say you succeeded. Therefore it seems that the answer to your question is: you can’t access developer workspace because you don’t have valid license.

You should have been addressing the problem with importing the license; unfortunately you didn’t give us any information about it. Please tell us what happens if you try to import the license, and what license it is.