Unfortunately your account should have already become inactive if you are not currently enrolled in a UNR class. We do not provide full-access accounts for alumni, but we do have Community Borrower accounts that are free for alumni:
Note that Community Borrower accounts do not provide access to online materials, but you are always welcome to bring a laptop or other wireless device in to the Library set up a free 1 day Self Serve UNR Guest Wireless account which will allow you access to most of our databases. The account expires at midnight but you are welcome to sign on daily.
Pick up Self Serve UNR Guest Wireless account information at the Library & Research Services Desk or use the self serve kiosk at the pillar to the left of the Computing Help Desk, as you face it.
More information here: http://www.unr.edu/it/network/wireless/unr-guest