Thank you very much. This is helpful (or would have been) but I had already deleted the files that were installed. So I'm 'stuck' with the sounds even though I no longer have sound typist installed. When I try to reinstall, I get errors. Below is the initial error report in case that's helpful.
ERROR SUMMARY
Below is a summary of the errors, details of these errors are listed later in the log.
* Activation of C:\Users\(my username)\(...)SoundTypist.application resulted in exception. Following failure messages were detected:
+ Exception occurred during store operation.
+ The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)