Hi! Actually i bought LRTimelapse yesterday, so i don`t know much about it. But i saw the tutorial deflicker and that "define ref-area" is missing on my deflicker workflow... is that a problem?

Maybe you watched on old tutorial?
In LRT3 you just define the reference area by dragging into the preview panel. Please watch the latest deflicker tutarial here on the page in the tutorials section.

Thank you so much! And congrats for the LRTimelapse, it`s awesome! The export quality is much better than the others apps (premiere and final cut).