As I pointing out in private communication, there exists a command line utility for extracting the waveform data. Documented in the Help: QSPICE™=>Waveform Viewer=>
QUX.exe -Export <expr1[,expr2[,…]]> [Npoints] [CSV|SPICE|ASCII].
Calling the solver itself, QSPICE64.exe or QSPICE80.exe, from the command line has always been supported.
–Mike