The short answer
Prepare a normal WAV, FLAC or other supported audio file first. The current audio editor is a file-based recording and editing workspace; copying a tiny .cda entry from File Explorer does not copy the song.
Why the .cda entry will not open as a song
An audio CD stores its tracks differently from a data disc full of MP3 files. The small .cda entries shown by Windows identify tracks on the disc; they do not contain the full audio samples. Renaming one to .wav cannot turn it into a recording.
Prepare an editable audio file
For a disc you may copy, use an appropriate audio-CD extraction tool and compatible optical drive. Choose an output your editor supports, such as PCM WAV or FLAC, and verify that the saved file plays when the disc is no longer being read.
This is a separate preparation step. The current CyberPower Audio Editing Lab download is not advertised as an audio-CD ripper.
Open, edit and export the extracted track
Open the saved file in CyberPower Audio Editing Lab. Select a range in the waveform, make your edits and export to a new filename. Follow the audio editing guide for those steps.
If you only need another file format, use the audio converter and format guide instead.