Can't set emclient 7 as default client in windows 7 home edition

Just installed emclient 7.0.27943.0 on windows 7 home edition. but can’t set it to be the default mail client. The option in the configuration tab is grayed out. 

Hello Peter,

To set eM Client as the default program, please go to Control Panel -> Programs -> Default Programs -> Set your default programs.

Regards,
Maurice