X:\(your installation Drive game path)\Twilight\GFX\Improvements\query... the file is there; i simply made a quick copy of the old and renamed the new one. Both are still there, AFAIC. SymbiosisPlatform--S has a similar issue, btw.
Like i said earlier, SD default installer keeps feeding us with the incorrect file - as long as yours is there, they can't overwrite it.
Even worst, the 'CivEventWnd.dxpack' screen is another bad issue since the self-installing file doesn't have the bottom row of shortcut Icons for parsing... the REAL thing is 109,087Kbs and was saved at 16:42 on 09/26/07 while the other but flawed file was made on that morning too.
Thus, every time i must upgrade through Impulse... they simply copy over with the bad version. I do have a backup folder for such stuff until they finally realize something's wrong (I told them twice & over since, and gave up).