HashListStringParser.exe hashlist_filename.txt
This will create a duplicates.txt and master_hash_to_string_list.txt file.
duplicates.txt will contain something like this:
00B6993D9DBF2147.ALOC, has duplicate: 00B6993D9DBF2147.ALOC,[assembly:/_pro/environment/geometry/props/furniture/shelving_unit_wooden_modern_a.wl2?/wall_japanese_modern_a.prim].pc_coll
master_hash_to_string_list.txt will be a copy of the hash list with your newely merged hashes.