From the email I received and looking at the screenshot, I think it's pretty good. I guess grammatically I'd change the paragraph for NTA 4.0 Only to say:
Flows will be stored on a different computer (server?) in your network. Select this option if you have a powerful machine dedicated for this purpose.
The bolded part was added. What about changing "computer" to "server"? I can't believe anyone would use anything other than a server to reach the performance they would need for NTA.