Hi @godel and thanks for your query. I am afraid to inform you that the Tobii EyeX SDK has been deprecated sand has since been replaced by the newer Tobii Core SDK of which you can read further information @ https://developer.tobii.com/consumer-eye-trackers/core-sdk/
I can however inform you that v1.8.498 of the Tobii EyeX SDK was the last version released so there has been no update to that which you are already using.
Please let us know if we can be of any further assistance.