Greetings,
1. I am unsure of how to find the version, but I know I downloaded the latest on 9/1/2019
2. After doing Madeline's transformation, I did get the mailbox with her quest, but the quest didn't take because I had a different persons main quest up in adventure. It didn't show up after I had completed the other person's adventure quest either. I went on to complete Nathaniel's adventure quest, but Madeline's still never showed up.
3. Windows 10, Intel i7, quad-core processor, 1TB hard-drive, (I also have a 1 TB ssd that isn't fully installed yet) , geforce GTX graphics