VFP save the full path of the project in the project table. If you copy the project into another path or if you change a folder name in the path, you'll get a prompt from VFP asking if it should replace the old path with the new one.

I keep a copy of the project in the source control for reference, but I don't bind my local copy of the project to the source control. To much hassle.

>What causes the message to popup that asks whether you want to change the home directory for the project? I thought it was simply having project files that did not have stored the same directory as the location of the files. We got our project files out of our source control, the directory where the project files were put is not the same as what is stored in the first record of the pjx file, but it does not prompt to change the directory for the project.