I have Prospect HD 3.4

When I export from AE, there's an option for High Optimized.

When I convert files using HDLink, there's only High or FilmScan, no Optimized - ?

High Optimized is a tad above High for complex scenes other it is the same as High. The "Optimized" version is many for tools that render, less used for capture, that is way HDLink never got it.