The Clip plus records perfectly clearly on version 3.9.1, it's just the level which is low. That wouldn't be as much of an issue if the ADC didn't work at 14 bit, there isn't headroom to play with. Although, that begs the question of whether the quality would be any better if you got a 14bit file limited at 0dB instead of a 16bit file limited at -12dB...
Rough mental maths says it's not that different.
So I'd say that a track recorded at low level, normalised to use the full 16bits would be the best quality you can get from the clipplus.
Then, I'm allowed to record all the way up to 96kHz using PCM WAV. Different encoders have different limitations.