Immediately sorry for my English. I am using google translate. It so happened that I entered the project from the Opera GX browser (usually I go through Google chrome). When I tried to overwrite the c3p file, I received an error that I do not have rights. Then, with Google chrome, I wanted to open a project and got an error that the file is not a c3p project. And it weighs 0 bytes. But I know for sure that it weighed 45 mb. I have no other copies. What should I do? I worked on this project for a month and a half. Is there a way to restore it?