If you navigate to the library's homepage (https://stevensonlibrary.org/) and click on the NoodleTools button, you will be asked for your SU username and password. Enter the same login info you use to access Blackboard.
Once you're on the NoodleTools page, click on "create a personal ID" to create your NoodleTools account. Leave the button "account linked to a school/library subscription or trial" selected.
You now have full access to NoodleTools.
Feel free to write back if you continue to have problems.
SU Librarian