What is a "nextbook"? Do you mean "netbook"? What operating system does it run?
You need Garmin Basecamp software, it's free. Assuming you have a computer running a recent version of Windows (Windows 7, 8 or 10) you can download it here: http://www8.garmin.com/support/download_details.jsp?id=4435
That version will not run on Windows XP, and I don't think it will run on Vista either. They offer an older version for these operating systems, however I don't know if that version will support the Alpha. http://www8.garmin.com/support/download_details.jsp?id=7161
I tried Basecamp on a Windows netbook that I owned about 6 years ago and it ran but it was sluggish. I still have an HP Slate 500 tablet that runs Windows 7 and have used that with Basecamp too. That tablet has a CPU comparable to many netbooks. Again, Basecamp worked but it was slow. A more modern tablet like the Surface Pro should run Basecamp more acceptably. But it will not run on Windows RT based tablet, it needs the full version of Windows.
No idea how all of this would work with your Alpha though, since I've never used one.