To install NoteTab on a new computer, please visit the Download page at our website to get a new copy. You will need to enter the email address you used when purchasing NoteTab, and your order number.
You can then install NoteTab on your new computer. To keep your settings, have a look at this FAQ: How do I transfer settings from NoteTab 4 to NoteTab 7?
If you experience any issues, please don't hesitate to contact the helpdesk.