Of all the ways to come traipsing back in, this is certainly one of the greater ways to do it. Fantastic you still had all those screens and glyphs on file and could go visit for a check in via the portal network.
Great to see you back out there exploring Traveller, the new update has sent a lot of us ancient iterations back to the realm of wonder and discovery, I believe @Mad-Hatter and @Sir_oops have joined you on the increased difficulty replay, one of the abandoned variety too.
I did something similar recently myself. I lost my original launch day save when I started a new playthrough in the pathfinder update. Back when you could only have one save file (of normal, permadeath and survival, each).
I knew I had streamed footage from that day and still had the screens on my PS4.
I was able to use a signal booster I walked past early in the playthrough in my second system to get the Mac address, then used the pilgrim star app to convert to glyphs.
I had a screen of the galactic map star field where my very first starter system was and was then able to navigate my way back by lining it up in game.
I then did my best to chart the route I took through systems before taking that first black hole trip into the deep.
https://forums.atlas-65.com/t/return-to-yudinipikus-a-travellers-quest-for-home/