When trying to rebuild my project, I get a message: "Project File invalid". Pressing Help only shows: "The project file has become corrupt" Gulp! This sounds catastrophic!!! Please tell me there is a way to fix this.
What causes this? My program started to show a strange behavior by giving messages about files and forms not found. Then, the project manager showed the icon of a form but without any form description and couldn't delete because obviously it wasn't found.
Any input will be greately appreciatted.

Ulises.