The last version is the 4.3 ( download it from http://www.waveflow.com ).
Addtitions from 3.7:
Volume Vumeters
Drag&Drop to the workspace creates a new waveform
Go to Start/Go to End buttons
Zoom In/Out button at the waveform window
Resample at any frequency
New 'Effects' Submenu
Help File corrected and updated
Wavelet Denoising Filter (to clean noisy recorded waveforms)
Ope/Save Raw Data Files (*.raw)
Grid
Color Set Configuration
Save Custom Filter as...
Child Windows listed in the Windows menu
Close All Waveforms option
New Look:
-New Icons
-More visual interface in the Forms
-Record Form reconfigured
-Audio WebSites option revised
Improved internal code of some functions