Compile issue

[Deedolith]

Hello,
After cloning the repository and loading it with Visual Studio,
I first recieved a compile Error:
main.cpp, line 408: std::ofstream fs = nullptr;
(there is no appropriate constructor to convert "std::nullptr_t" into"std::basic_ofstream<char, std::char_traits>"

Second,
After fixing the above error to: std::ofstream fs; I was able to compile.
I launched without command line arguments, and when prompted to choose how to find the save path, no mater the choice I input, it is always refused.
Also, an option for exiting would be welcome.