Hi,
VinylStudio keeps tracks of all your files for you. To work on the album when you reopen VinylStudio, just select it from the dropdown list (the last album you were working on will be selected by default).
If you want to look at your raw recordings, open the Settings (Windows) / Preferences (Mac) window and click on the topmost Explore / View in Finder button. This will open an Explorer / Finder window positioned to the folder where these are stored.