I already find the password, i will message it to you right now, feel free to send the BTC to the bitcoin addy i have in my profile. As proof i will leave the screenshot here:
You may have determined the encryption key, but that's not proof. I'm tempted to give you neg trust for that post.
you can duplicate his screenshot by using the seed phrase OP posted in first link:
purpose horse hundred around young explain aspect off almost where lawn number
the only way he could have found the password is if the password was something simple like 123 and he simply went through the common passwords to decrypt it!