xDx Designer froze and I eventually had to kill the program. However, now when I open up the project I cannot edit the schematic. It says This schematic is in readonly mode because it is locked by "me" (my user names goes here).
Maybe check if you have a file called sAdress.adr in this folder ...Projectname\database\cdbsvr\sAddress.adr
Normaly this file is only existing if the design is open, if you close it it will be deleted by the system. I am not sure if this is the problem but you can give it a try. Make sure the design is closed then check for the file if it is there delete or rename it.