I'm trying to verify that a tool to export data from one source control platform to a second works properly before we spend money on a non-demo license. The demo version only exports the first half of each file. As a result a folder diff will show every file is changed (truncated at 50%).
Since I have several hundred files in my application checking each one at a time isn't practical. What I'm looking for is a tool that will let me arrow down the list of files in the folder diff view and automatically show a file diff when the file is present on both the left and right hand sides. Alternately being able to select groups of ~10-20 files in the folder view and launch separate file comparison windows for each in a single action would be acceptable.
I've tried DiffMerge, KDiff, BeyondCompare, and WinMerge; but haven't been able to find an option to do what I want. Especially in the latter two it's possible that the feature exists but I'm just not finding it since I've never used them before today.