Lunascape uses the Trident engine of the IE version that is installed on your system.
You can verify which version of Trident is being used in Lunascape by opening Help > About Lunascape...
The dialog that opens displays the versions of all components in Lunascape.
Is Lunascape's trident version tied to the installed IE's trident version?
Does Lunascape use Trident 6 regardless of OS and IE version or does it use whatever trident version that is available on the system which it is installed on?
For example (1) System : Win XP - IE8 (trident 4). Is Lunascape use trident 4 or trident 6 on this system?
(2) System: Vista / Win 7 - IE9 (trident 5). Is Lunascape use trident 5 or trident 6 on this system?