This is a maintenance update to exrTrader.

Changes since V1.6b:

• Changed the default location of the license file to be located next to the plugin to prevent licensing issues on Windows
• Split up the Render Mode into a layout saving option as well as an option to request all buffers for VIPER
• Updated the zlib library in Windows with a version that is better optimised, resulting in minor speed-ups when compressing EXR images using ZIP compression. The OSX build uses the zlib library that ships with the OS.