The forum for NXT 6 is coming soon. In the meantime, just continue to post here and your posts will be moved when the new forum is available.
I just tried and screen capture did work. As for the other issues, You have to be more specific. If you can be more specific, I will try to see of I can duplicate them. There will be updates when enough people have the issues and they cannot be fixed any other way.
One major difference is you are using Windows 7 and I'm using the latest version of Windows 10. There may be some issues there. Did you install the program with your antivirus and any registry cleaners active. That is a bad idea and can lead to many problems.
If the program doesn't work for you because it is too basic, by all means return it, You have 30 days from the date of purchase.