Yes, you can upgrade if you are still a student and meet the eligibility requirements to purchase a student version. Wolfram Research offers upgrades for all Mathematica for Students licenses. We will need your Mathematica for Students license number to place your upgrade order. For students inside the United States and Canada, price information for Mathematica for Students is available in the Wolfram Research store. If you are a student outside of the United States or Canada, please contact your local Mathematica reseller for an accurate price quote.
Some international versions contain special language kit compatibilities and vary in price.
A list of international resellers is available on our web site. No, you cannot since Mathematica for Students is for use by enrolled students to install on their own personal computers. However, Wolfram Research has a number of methods of providing Mathematica to professors, faculty, and staff members for evaluation purposes. If you are interested in evaluating Mathematica , please contact us for more details. I'm interested in using one or more of the Mathematica Applications Library packages.