On Wednesday, 11 November 2015 at 12:05:16 UTC, Martin Nowak
This is an unplanned point release whose sole purpose is to fix
a severe Windows installer bug.
@Martin: In reply to
I switched the installers for my workplace from NSIS to InnoSetup
 and was very satisfied with it.
In my opinion it's superior to NSIS.
It might be worthwile to strive to change but I might be wrong
because I never looked on the Dlang installers.