I have installed ARM DS-5 community edition. For me to enter the activation code the option is in disabled state. what is the problem.
Assuming you have downloaded the standalone version, rather than the Eclipse plugins:
Click Help > ARM License Manager... > Add License and then add the activation code from this page: DS-5 Community Edition / Getting started using DS-5 installer | ARM Development Studio 5 to the dialog box below:
If you're still seeing the problem, let me know.
I have downloaded from the following path
DS-5 Community Edition | ARM Development Studio 5. Can you confirm me whether it is community edition or not.
Did you follow the link on the left or right box?
If possible, please could you provide a little more detail so that we can figure out what is happening? Do you, for example, see the "add license" dialog that I posted above?