New with questions

Hi,

Very exited to use this tool, I’m not a developer but I have some knowledge in a few small things in code.
A while back I have worked with a developer to do a simple webapp but unfortuntly we have stoped to do freelancing and not able to work in the webapp, if I upload all the files to Cursor without selecting the file the Cursor is able to detect the parts of the project I want to modify and add new features?