It’s important to clarify: (released around 2010), and it is not available as a legal download from Steinberg’s official site anymore. Any “Cubase 5.5.3 download” you find online today is almost certainly a pirated/cracked version , which comes with significant risks.
: Removed the "wet-lock" when used on Group or FX channels, allowing for more flexible mixing. Cubase 5.5.3 Download