been working on a fairly complex PCB design and in the middle of placing a track, the software crashed. when it reloaded, the .pcb seems to be corrupte as I get an error sayin "Unexpected file format". I have tried the backup files and the security file and get the same error. Have tried to load the files on a different PC and get the same. Anyone know about this issue? any way to recover this file? Dont really want to have to redo 2 days of work.