Batch conversions are really easy using pcdMagic for Windows. All you need to do is drag-and-drop either a directory containing PCD files, or a selection containing multiple files onto the pcdMagic window. pcdMagic then automatically goes into batch mode, and will process each file individually, showing the results on the screen shown below.
Important notes on batch conversions
Whatever the settings you have selected on the left hand side of screen apply to all files converted.
If you drop a directory onto pcdMagic, pcdMagic only looks for files with a ".pcd" or ".PCD" extension. In addition pcdMagic doesn't look in sub-directories.