Thanks for your report!
Topic 1 is a known bug.
Topic 2 works when you use “Export…”. Your file printer isn’t part of the QucsStudio package.
Concerning Topic 3, I don’t like alphabetic order. But change it to “most useful” order is perhaps a good idea.
For topic 4, the correct syntax is Pr1.dV ! (Just have a look into the dataset.)
With topic 5 and 6, you’re right. That’s just as it is.
In topic 7 you have to write 1mA or 2.3mV. The term 3m mean 3meters.
I hope that helps!