Thanks for pointing this out.. After checking my registry it seems I am on .net frame work version 4.0
All the options work for me except F6 for instant build units.
I will install the latest version 4.71 and report back.
Edit - After installing .NET Framework Version 4.71 as suggested from previous posts all of my options are now functioning correctly.
Might be worth others doing so also. thanks
[Edited by cgd442, 12/27/2017 12:39:43 PM]
Yeah. Its wierd.
In my PC this options don't work too.
But on my notebook all works well.