I made builds of Snowflake, compatible with Windows 7:
snowflake-client-2.9.2-6d2011de-win7.7z: removed
snowflake-proxy-2.9.2-6d2011de-win7.7z: removed
To use client binary, broken file from Tor Browser, located at Tor Browser\Browser\TorBrowser\Tor\PluggableTransports\snowflake-client.exe
should be replaced with snowflake-client.exe
unpacked from snowflake-client-2.9.2-6d2011de-win7.7z
with 7-Zip.
EDIT: removed download links