Actually, this codename is similar to the naming format of Windows 10 version which is release year + month. Like the upcomping version is 1803 which means March, 2018 and Xbox is 1804 which stands for April,2018.
The naming format of Renee software are similar to Microsoft. We adapt date to be the codename. Let’s take the lastest audio recroding software – Renee Audio Recorder Pro as an example. The latest version is 2018.03.28.47.