Use previous install options when upgrading
Created originally on Bitbucket by marcusl (Marcus Lindblom Sonestedt)
It's slightly annoying to have to select 32-bit shell extension every time. (Useful when running 32-bit programs, of which many are...)
So, either have it be the default (to help only me >-) ) or have the installer remember the last settings when upgrading to a new version (to make everyone happy).
(P.S. Thanks for all the immense work on THg!)