Normally download binaries from:

https://github.com/vslavik/winsparkle/releases/download/v0.5.3/WinSparkle-0.5.3.zip

Repackage to kodi format... :)

Currently we use the source from https://github.com/vslavik/winsparkle master 
with this (important) PR merged
https://github.com/vslavik/winsparkle/pull/139

and compiled our own via VS2015.