Red Rock Software on Tuesday announced DeltaGraph 5.6, an update to its charting, graphing and data analysis software for Mac OS X and Windows. The new version gains more than 30 enhancements. While the list of changes varies in the Mac and PC releases, the Mac update can now open DeltaGraph 5.6 Windows files and improves copy/paste and drag and drop actions. What’s more, DeltaGraph can edit drawn elements copied from and pasted back to a drawing canvas. DeltaGraph 5.6 is a free update for current users. A new license costs US$299.