You write you saved the audio as a new file, but was this under a new name? In other words, did you choose to "Save as..." or simply to "Save..."? If you chose to "Save as...", your original file will still be there, unedited, unprocessed in any way. If you chose to "Save...", unfortunately you have overwritten your original file. As to how to remove applied effects once they are saved to a file in Waveform view: you can't, sorry! That is why you should always work on a copy of your file OR, as soon as you have opened the original immediately do a Save as.. under a new name or with some sort of addition to the name so that you can clearly see this is NOT the original file. Speaking personally, once I have completed work on an audio file I almost always add "_processed" to the file name and then save it.
... View more