Using the "Merge Open" option, I am trying to merge two audio files created from cassette tapes. Each file has been successfully edited and saved; they are 825 MB and 550 MB respectively. However, after renaming the merged file, and selecting "Save", the "Scan For Tracks" process freezes at 99% complete, "Hiss Filter" becomes highlighted, and I have to shut down the app. A merged file is created, but contains the same bug that froze the app initially. I'm scratching my head as to the cause. Any ideas?