Steem SSE 3.7.3 WIN32 has been released on 5 December 2015.
It is mainly a bugfix release.

v3.7.3 Features
Heavy compiler (VS2008) optimisation
Your processor needs to be SSE-enabled (of course)
SCP randomise start of track (War Heli)
New steem.ini-only option TosVersionWarning
Shortcuts for disk image selection

v3.7.3 Bugfixes
Extended monitor in D3D fullscreen
crash when using D3D without DirectDraw
reading video counter in some case (20 years STE intro)
stupid compiling bug in MOVEM (Sea of Colour STE)
6301 emu + ACIA timings (Snork/Defulloir)
some bugs in PRG, TOS, STW support
Blitter hack for Relapse broke several programs (but it was fine
without option Hacks) - sorry, it was a relapse, the worst being
that I knew it... can´t help it