How the old WoV project was obtained?
I remember in the WoV 2.x days that robot backups made through network would bring apparently corrupted projects.
When trying open these projects on WoV, you would get an error, and project won"t be opened. But if You check on the projetc folder, there would be a copy of the corrupted project, with the _bak suffix attached to its name, and this project would open correctly.
The WoV solution I have is from the last archive that was taken of the original controller. I will definitely dig in to that!