There's a reasonable number of changes in this release - which you can read about on the changelog page. The most significant change in this release is an update to the default appearance of most of the charts. The default colors have been updated (which you can see on this page: https://www.rgraph.net/canvas/default-colors.html ) and various properties on the charts have been updated too (for example, the background grid, the axes). As a result, the charts look more modern and "cleaner". You can see examples of the new appearance of charts on these pages: