Cooledit 2000 issue
I have been using Cooledit 2000 happily for years. Unfortunately this product is no longer available, and Adobe, who purchased the product rights declines to support it or offer it any longer. So when I suddenly could not convert .wav files to mp3 I was concerned. The message: "File is probably in use by another application." Clearly spurious, as the file was not. But with some help from a suggestion in a forum years ago, I realized the problem was caused when I accidently had two copies of the same file open, and modified one. Cooledit then loses track of what is open and what is not. So the solution (if anyone every has this problem again) is to delete the COOL.INI file in Documents and Settings\<user>\Application Data\Syntrillium\Cooledit, and allow Cooledit to recreate this file. You'll have to do a trivial bit of setup again when you next run Cooledit. Phew.