You should be able to open files.. Check to see if the project file is not corrupted, because fl studio sometimes acts strange when you try to open corrupted files. Oh, and check the suffix to see if it is either ‘.flp’ or ‘.zip’ (zip files contain the project along with the samples inside it) . On it’s first run, it opens a file called ‘newstuff.flp’, if it opened that, it means you are able to open files. (in fl studio, on the side browser, scroll down to Projects, and drag and drop ‘NewStuff.flp’ on to an empty area , it should open.