/Applications/Pianoteq\ 6/Pianoteq\ 6.app/Contents/MacOS/Pianoteq\ 6 --fullscreen

The space before 6 has to be preceded with a \ in my case. Probably under Windows you need for the same purpose to totally enclose the path with two " as in the FAQ.

I read in the FAQ :

How do I make Pianoteq to always start up in full screen mode?
Add the following command line option: --fullscreen Example: "C:\Program Files\Modartt\Pianoteq 6\Pianoteq 6.exe" --fullscreen

In the command line, I type cd\ and after, Program Files\Modartt\Pianoteq 6\Pianoteq 6.exe --fullscreen

I receive an error message. I also tried to go inside pianoteq6 folder and only type Pianoteq 6.exe --fullscreen, it is the same, an error message too.

It would be nice if someone could help me.