SftTree/DLL 6.0 is virtually 100% upward compatible from version 5.0 and earlier versions. The following major enhancements are now available in SftTree/DLL 6.0:
- Now combines 32-bit (x86) and 64-bit (x64) editions into one product.
- Support for new image formats, such as PNG, TIFF, JPEG, GIF, Exif, EMF+, EMF (GDI+ images) with full support for alpha-blended (translucent and semi-transparent) images

- Support for content windows, which are complete, user-defined windows that are rendered as one cell. Possible uses are to display Flash, Windows Media Player or Web browser controls, dialogs, and other child windows.

- New selection outline display style (see SetSelectionStyle) which supports a rounded outline rectangle with a gradient fill

- Transition effects for expand/collapse buttons and tree lines on all operating systems (similar to transition effects found on Windows Vista), see SFTTREE_CONTROL, iMouseOverTransitionEffect
- New function to draw a rounded selection outline rectangle (see DrawSelectionOutline)
- New SFTTREE_COLORS member supporting the new colors for selection outline rectangles
- New SFTTREE_CONTROL structure supporting the tree control attribute definition.
- Additional search modes matching items in response to characters typed by the user (see SetCharSearchMode)
- New built-in button styles (see SetButtons, SFTTREE_BUTTON_AUTOMATIC3 and SFTTREE_BUTTON_USERDEF)
- Functions to load GDI+ images from application resources (see SftTree_LoadGDIPlusImageFromResource and SftTree_FreeGDIPlusImageLoadedFromResource)
- Digitally signed DLLs
- DynamicHelp and help integration with Visual Studio 2008 (in addition to all others which were already supported in previous releases)
- More sample code in documentation