Sorry, we haven't produced a 32-bit Windows version. There's a lot of post-launch chaos to tackle, so I'll add this to the list, but I can't promise a timeline. :(
Does the web version work for you on your system? I'm not proposing it as a fix, but it would work around your issue for now. All platforms use the same account data, so you can always continue where you left off if we do end up producing a 32-bit Steam version.