When I try to remove a click I select the passage with the click in it and choose ‘click removal’ from the effects menu. If I select ‘preview’ the passage plays fine with no click. However, if I select ‘OK’ nothing seems to happen and the click is not removed. Am I doing something wrong, or is this a bug?
I don’t see anything obvious that you are doing wrong, but on the other hand, if clicks are removed on preview then they should also be removed when you apply the effect. I’m not aware of any bugs in this area.
Could you perhaps post a short audio sample in WAV or FLAC format (just a few seconds will be fine, but not MP3) and post exactly what settings you are using so that I can try and reproduce the problem.
I applied pop mute to a selection in the original file, and that reduced it to a much smaller, higher frequency, click. I then applied click removal and that worked fine and removed the noise altogether.
Strangely, I then applied pop mute to the click file that I posted (which was just a similar selection from the original) and that removed the sound entirely in one go. That seems odd to me.
The preview on the original file was about the same length as the file I posted. Maybe a few seconds longer, but probably not more than twice the length.