Okay, managed to get all memories and interactive CG unlocked without having to go through all the save registry edits and all the other annoying junk.
I found 3 save files on this V-Lover Steam guide that DO work to fully unlock everything (At least on my PC. May or may not work for you).
Link to steam guide with the 3 different save files that have the bad ending, happy ending, and normal ending respectively which allow you to unlock all memories and interactive CGs (scroll to bottom of said Steam guide).
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Links to bad ending, happy ending, and normal ending respectively if you are too lazy to scroll down of said steam guide:
Google Drive
Google Drive
Google Drive
After downloading all 3 endings, move the save files to this path and launch the game:
C:\Users\[name]\AppData\LocalLow\Hentopia\V-Lover\Saves
This worked with me using the v1.06 of V-Lover downloaded from this website/thread (F95zone).
Pro tip - Use "Everything" software from Voidtools in order to easily find the correct file path for any video game or other super hidden files. Make sure to download the Installer 64-bit for best results in my experience (not sponsored or anything. I just find this tool stupidly helpful and dummy fast in my experience).
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