The change history is in the link, but here are the updates from v4.3:
Version 4.5 (April 12, 2011)
- Now it is possible to adjust Lighting, Colors, Levels and Curves within selected areas of an image
- Fixed bugs in the Print and Email dialogs
Version 4.4 (March 25, 2011)
- Improved the "Acquire Image from Scanner" tool (previously called "Scan Board"). Now it supports batch scanning to PDF, TIFF, JPEG and PNG. It allows users to rotate, crop, deskew, annotate, print, email and save scanned images directly within this tool
- Added "Watermark" to the Effects menu
- Added "Auto-Rotate" option to the Print dialog
- Added drag-and-drop capability to the Print dialog
- Improved the USM-Sharpen algorithm by allowing up to 50 pixels in radius
- Improved the "Full Screen Preview" of the "Sharpen/Blur" tool. Now it is possible to make adjustments in full screen mode
- Fixed a bug in the "Adjust Lighting" tool that it could not save changes of Highlights
- Other minor improvements and bug fixes
Maybe just me, but I was a bit flummoxed on how to select an area within a photo, so for anyone else who hasn't used that function before:
Open photo, right click, 'Select', then choose 'Rectangle', 'Circle' or 'Freehand' Select Mode.
To make selection on photo, press CTRL and drag mouse.
Fastone doesn't mention above that sharpening can also be applied within the selected area - perhaps that facility was already there.
Unfortunately, when in the adjustment window, only the selected area is shown, so you have to apply the adjustment to see how it compares with the rest of the photo. Maybe this will be changed in a future update.