Well darn. They’ve decided to stop making the SDK available for general download. From this thread: LeiaSR SDK for Windows no longer available?
For business reasons, our suite of LeiaSR SDKs are currently no longer publicly available and are only provided to our OEM/business partners.
For Acer and Samsung product lines we have been directing inquiries to Acer and Samsung for direct SDK support.
For LeiaSR SDKs please contact us either at business@leiainc.com or sdk.support@leiainc.com with your use case and our commercial team will get right back to you!
I guess if you’ve already got an SDK installer on your hard-drive, don’t lose it. If you don’t, well, you’re not going to get one from Leia without going through the hoops.