I have all my main user files on a D drive.  When I image using backup software my files from computer one to computer two, I can bring over the magnet links, .torrent files and torrent data files, but I cannot continue to help seed completed torrent data files.

I tried to use the +ADD button at the top left of the window, and when I choose the tab - CREATE NEW SEED, then NEW, then choose a SINGLE FILE or FOLDER-BASED SEED, I can create in the window on the second computer the torrent for upload as a seed with PROGRESS of 100%, but what is different is that there is an ORANGE asterisk at the end of the torrent name.  The issue is that no one sees the seed torrent to download from it.

How to get Tixati to see my torrent files to be able to seed to other users after migrating from another computer?

In order to continue seeding your completed files you have to add the torrent file and then point the torrent at the completed file and then force check the torrent. You can't keep seeding a torrent if the files are not there.