Note: these settings are only available in UEStudio
The Integrated applications » Ruby branch of Settings includes the following option.
By default, this field is populated with the full path to the Ruby executable if UEStudio detects that Ruby is installed on the system. This is required to use the "Ruby" features in the "Scripts" group of the Coding tab. Click Browse to browse to and select the location of the Ruby.exe if this is incorrect or not set.
Note: Ruby is not automatically downloaded and installed by UEStudio and must be installed separately.