Fail to save song

Hi Brad, could you please help me?
Windows 10 x64 C3 3535

Cantabile did not overwrite the song files. Setlist has same problem. The file could not be replaced?
I have to create a new one: example song : dream becomes dream 1 on so on. The songs must be saved as: My setlist did not find the songs anymore.

I have uac off.
Best Regards