Character and configuration has been reset

[Bass50 43]

Just logged in after not playing for just under a month and my character has been reset to default female and my name has changed from my steam name to my pc account name. Lost all my gear and configuration (keybindings and video settings). The .cfg of my old profile is still in my documents, but a new one has been made with my system name. Is there any way to get my old character back or has there been a database reset? Also how do I change my name back to my steam name and make the game use my old config file?