Question / Problem
TSP 5.2.3 works great in finding thousands of duplicate files, but how can I select the subset I want to delete other than one at a time?
Answer / Solution
If you want to keep the newest file of every group only, hit Ctrl+A to select all and then choose "Check all but newest" from the right click menu.
If you want to choose for each group of files individually which one to preserve, you obviously need to do this one by one.
An export to Excel might also be helpful if there are other criteria by which you want to decide which files to delete. Excel 's Auto Filter is a good tool to filter the list of files.