Hi Ryan,
Thank you for contacting Extreme Networks Community. You can use WiNG Manager v1.0.8 if using an AP505i. The link below will require you to first log into the Support Portal, then click the link again to bring you to the WiNG Manager v1.0.8 download page. A case may need to be opened for access which can also be done through the Support Portal.
https://extremeportal.force.com/ExtrProductDetail?id=01t2T000002kZbAQAU