You can get the Oasis installer here
Save the license key file to your desktop (or server desktop) and follow the attached help document for installing OASIS.
You will be installing OASIS along with creating a database and installing the client portion on any other machines needing access to OASIS.
Once setup, you should be able to click on the OASIS icon, login as "demo" (no password needed) and begin setting up OASIS. Instructions for entering Manufacturers, Customers and Contacts can be found on the site. Click here.
If you need help installing or have questions please let us know, anyone here can help.
Call Support at 501-843-6750
or email at support@OASISSalesSoftware.com