I have 'Sins of a Solar Empire Dev.exe', 'Sins of a Solar Empire Diplomacy Dev.exe', and 'Sins of a Solar Empire Entrenchment Dev.exe'.

I also have:  'Sins of a Solar Empire Developer.exe', 'Sins of a Solar Empire Diplomacy Developer.exe', and 'Sins of a Solar Empire Entrenchment Developer.exe' in the same folder, F:/Sins/Stardock Games/Sins of a Solar Empire/

I can run all the 'Dev.exe' applications, but when I try to run the '... Developer.exe', I get an error about 'SDActivate.exe'.  So I run 'SDActivate.exe' and nothing happens.  I try to run '...Developer.exe' and get an activation window, so I enter my email address and paste from clipboard the registration number from my impulse window/acct.  I click 'Activate' and it tells me "Invalid Product".

What gives?