Compatability with LTspice?

But what if I’m not using those special encrypted models, but only the ordinary ones and ones which are defined by a standard spice language?

Also, even if the LTspice schematic includes things which can’t be converted, couldn’t we convert those to empty symbols without a model, which we’d then add in Qspice manually?

Sure, it would usually require some fine tuning after the conversion, but it would still be a big time saver, compared to complete redrawing of something you already have a schematic of in LTspice. Especially if it’s a tidy one you spent your time with.