Add region data with this utility. dftadd can help you add specified region data from file2 to file1. Files must have same number of frames. If the number of region is not specified, all TACs are added. If file1 does not exist, it will be created.
This utility is command prompt based so dont expect any fancy interface to help you process your files. So, if you wanted a tool to help you process TACs, take dftaddfor a spin and see if its capabilities are enough to satisfy your needs.

Usage: dftadd [Options] <file1> <file2> [Number or name of VOI to add]

Options:
-sn
Copied region names are changed to contain the study number
-ovr
Existing file1 is overwritten
-nt
Program does not mind if the time or calibration units do not match
-h or --help
Print this message and exit
--version or --build
Print software build information and exit
--silent
Program works silently, printing only error and warning messages
--verbose
Program prints more information about what it is doing.

The license of this software is Freeware, you can free download and free use this calculator software.