FYI… the longer you wait to use a program like recuva the less chance you have of it finding a recoverable file. This is because as you use the computer, saving files and whatever, these files start to overwrite on the hard drive spaces that might still have a recoverable file. So, if you are going to try recuva it would be best to do it asap. Even if you have to install it in the same drive.
Also… it really is good practice to start all new projects from the Steinberg Hub. From there you would typically start a project by double clicking on your template and the process will prompt you to create a new folder at the location you want to save your project to. Just make sure you have the option “Prompt for project location” checked and not the “Use default location” option checked. This way you will end up with separate project folders that each have their own audio pool. Much neater and less likely to get confusing when working the project.
Good luck 
Regards 