Here you go! Thank you for the help with this, by the way.
No problem! ^^
Aah, you're definitely on the wrong version yeah... I can't tell which one this is for sure since this is from before I started adding the version label in the bottom right, but it's definitely several builds old. Even the floor number in the bottom left is still here, that's been replaced by the area's current oyon colors in newer builds. There isn't really a reliable way to farm shards in that old build.
I'm sorry to say you very probably won't be able to transfer your save from this build to a newer one...
One thing you could do is grabbing the actual most recent demo (it's pinned on Patreon!), and making heavy use of the debug functions (which are explained here https://www.patreon.com/posts/92141393), but that's about all I got.
I think I see what I did wrong. I tried to copy a data file from an older version to the new one to try and carry over the save file, but it seems it basically just meant I kept playing the previous version of the game. Shoot! Well that explains things at least. And you're correct, it doesn't seem I can carry this save to the new one the usual way. That is a shame, but hey, least I have a new version of the demo to enjoy some time soon. :P
Thank you for the help!