Hi,
You don't need to do anything at your end, as far as your membership goes, when you switch computers, so don't worry about that…
It'll be interesting to see if you can figure out how to transfer all of your uTorrent files over to your new computer, in order to continue seeding those... I think a daunting task.
If you can copy the video files over, then use the procedure below for reseeding (looking at your profile for the "Show Completed Torrents" list) then you could, one at time, start seeding them again...
"If you ever wish to earn upload credit for reseeding videos (where you already have the video on your hard drive), the illustrated procedure is here: https://forum.gaytorrent.ru/index.php?topic=6539.0 "
Good luck,
Pawpcorn
GTRU Staff