I mistakenly was using the 32bit version of videopad. (v13.30)
And after installing the 64 bit version, the height, and look, of the audio tracks is back to "normal".
But I also installed that same 64bit version on an other laptop, and that one shows 3 horizontal dots just below the peak audio level indicator.
I believe they are for adjusting the height of the audio tracks. In my opinion a rather useless feature.
Installing the 64 bit version, also mostly, seem to fix an issue with digital artefacts.
Mostly, but not completely 🙁 They are probably related to the nividia k1100m processor.
Software rendering is better, but also slower.