No CBR option for MP3 export?

We have a new reader who cannot get a constant bit rate export option:

after I press “Export as Mp3” under the format options for “Bit Rate Mode” the only options are preset, variable and average, there is no available option for constant which seems to be what is needed for Librivox.

I am running audacity [2.4.2] on my mac with the El Capitan operating system. My Mp3 is recorded as a single mono track. I have tried deleting and reinstalling the program, closing it and reopening it as well as restarting my computer none of which seems to have helped. Here is the link to the export box screen shot. >

Why does this user not have a Constant bit rate option? How can we get one?

Thanks! :sunglasses:

Apparently, all that was needed was to resize the export window. :unamused:

So, I guess this is solved.

I was about to suggest that :wink:

I’m not sure why / how they were able to have that dialog window too small to display the full contents - I’ve tested on my Mac and the minimum size shows the full contents. However, I’m using Big Sur, so perhaps the problem is specific to El Capitan :confused: