When you create a new project, the project name you choose will be used in many places, like the name of the project folder itself, but also the .uproject file that resides at the root of your project folder.
There’s the .sln file, and even your binaries in Projectfolder\Binaries\Win64\ will contain the original project name. I don’t know how you have done the renaming though, but you should be able to find the original name, somewhere.