If you do not have these backed up it is highly doubtful that you will get them back "by conventional methods."
You have now, indirectly, also learned a painful lesson: Even if a given program defaults to saving in a folder structure beneath its location in the Program Files directory you should immediately get into settings and change that so that they are placed somewhere else. I cannot understand why anyone writes stuff anymore that uses a hierarchy under Program Files for user data.
You might want to consider downloading TestDisk and using the PhotoRec (Photo Recovery, which can recover a lot more than photos) to scan your drive for the specific file types you wish to get back to see if it can reconstruct a lot of them. Do not take the default of recovering "everything" or you'll have so much data you won't want to sift through it all. You'll need an external drive on to which PhotoRec will place the recovered files. You should do this sooner, rather than later, as all of the data blocks that hold those files are now available for the taking by Windows 10 as new files are created. The longer you wait the more likely that something is going to have been overwritten. Definitely scan your unallocated space, too.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134
In a modern society where everyone thinks their opinion deserves to be heard nothing annoys me more than individuals who mistake their personal preferences for fact.
~ Commenter TheCruyffGurn on the The Guardian website, 8/13/2014