Yes.
You have a typical anomalie, it should be easy to fix.
go to
tools
options
audio processing
clik "use this specified folder"
then name your own folder and drive [ example - D:\audio\wavepad-working-folder ]
clik ok
DON'T ASK WHY IT WORKS, I have no idea.
I was having the same problem, and that is what I did to fix it.
That's all I can tell you.