I had a chance to take the new beta for a spin. Open merge works well now, as does the cut and splice normalizing. In fact, that part seems to work better than ever. I had the chance to try it out on a record that had more dimples than a cherubs convention. The wide splice always left a big hole but not any more, the transitions are quite seamless.
The spectrogram is fabulous; I'm finding clicks in places I never would have looked. I find the scale range to be a bit limiting, but I'll take it the way it is, it's a huge step forward. Just a couple of things: Going to overview from spectrogram view the radio buttons don't update properly, so that in a single track overview, the buttons read "corrected " and "original" instead of "track#"). Also, the spectrogram defaults to the original (uncorrected) view constantly. In my opinion this should default to the corrected view in order to sync visually with the corrected playback (spacebar).
One last oddity: After recording several internet streams with another disc recorder, Wave Corrector wouldn't open one of the wav files, telling me instead the format needed to be 16bit, 44.1 kHz, etc. All the files recorded should have been in this format, so this one pop-up was a bit of a puzzle.
Overall, a huge advance over 3.4. Thanks again.