Restoring messages from backup not working I tried restoring the folder ~/Library/Messages, and ~/Library/Containers/com.apple.iChat, but when I opened Messages every single Message but the last was gone for every conservation. Can I bring back my Messages somehow?
The messages themselves are stored in the database file, ~/Library/Messages/chat.db. After that file is definitely in place, try rebooting your computer. 

In my case, once that file was in place it would only show 1 message from each of the conversations, but after rebooting, all of the messages showed up.