Feedback on GUI, received via email.

There should be a space between the heading 'Welcome to NVDA!' and the remainder of the text under that.

The following text should come next right under the main welcome heading:
Press NVDA+n at any time to activate the NVDA menu.
From this menu, you can configure NVDA, get help and access other NVDA functions.

then a space to seperate out the information a bit
Then on to the comments about the different modifiers:

a few wording changes, nothing major.
By default, the numpad insert and main insert keys may both be used
may both should be are both... as in this should be
By default, the numpad insert and main insert keys are both used

You can also configure NVDA to use the CapsLock as the NVDA key.
the should be an, because it is one of many, so it should be:
You can also configure NVDA to use the CapsLock as an NVDA key.

then a space again, and the options

Automatically start NVDA after I log on to Windows
should be:
Automatically start NVDA after logging on to Windows
(this is just to be consistent with the fact that we do not use the first person in any of our dialogs)

Show this dialog when NVDA starts
should be
Always show this dialog when NVDA starts

and I think there should be an OK/Cancel group instead of just OK, and then this group should be right aligned for consistency with other dialogs