WavePad loads file but audio wave form is not displayed and file has no sound

The software appears to load an audio file, but there is no wave form displayed on the WavePad window, just a flat green line, and the file has no sound when played.

When WavePad loads a file it keeps a copy of the working audio (in full quality 32 bit) in its Audio Working Folder for fast editing and processing. By default this working folder is located in the Application Data folder of the user of the computer that WavePad is installed on - for example, 'C:\Documents and Settings\my_user_name\Application Data\NCH Swift Sound\WavePad'.

If you are running out of hard drive space on your C: drive you can change this Audio Working Folder to be some other folder on a different hard drive or hard drive partition.