Throughout the year, we typically release software updates as well as hotfixes. While both are free, updates containing new features and improvements are made available only for the newest version of V-Ray. Hotfixes, which consist of only bug fixes, may be made available for previous versions as well.
Hotfixes for older versions of V-Ray are only released when an essential fix is required for an issue that occurred after the release of the software. An example of this would be if a host application or operating system update caused a critical error in V-Ray/Phoenix.