Help Technical Problem

I think that I am experiencing a technical issue with Lectora. I have created a new title, and published it. Today I went back to make a couple corrections that I noticed after it was published to a single file executible. When I try open the file, I get a message that says "While loading the Title, a resource specified within the title could not be found. Please enter the correct link in the field below. If you wish to continue with the resource removed press the "remove resouce" button." I have tried to press the "remove resouce" button and when it loads my background and all of my buttons and images are gone. All of my text is still there. I don't know where I went wrong, can you tell if this is something that I have done or if it is some other error. Please help me!