Unable to burn CD with vrsion 5.4

After a power failure during burning process, we can not burn CDs. We received this error:

An error occured while crating the audio CD. Some of the content you are trying to save already exist in the Save location. Save to another location (recommended) or delete recordings (use with care) and try again (0xe04ea00a).

Can you tell me the path where FTR (version 5.4) save the image before burning? I need to delete those files and try again.

Thanks