Hi Cynthia,
Thanks for reaching out.
You can follow steps below to setup the Advanced Role Mapping version of the plugin.
1) Login to miniOrange dashboard with the same account with which you have made a purchase.
2) Go to License menu and you should be able to see a download link for the LDAP plugin. Let me know in case you do not see it.
3) You will also need a license key to activate the plugin which you can find under License menu > View license keys buttton.
Let me know if you see any issue.