QCAD Professional single user licenses are valid for a single user on all supported platforms (Windows, macOS, Linux).
Multiple installations on multiple computers and operation systems are possible as long as there is only one user per license.
Licenses are not time limited: buy once, use forever.
Supplied on USB and includes tutorials ,and also how to setup custom tool bar
The Pro version give's you easy to use features,draw lines,squares,circles,tangents,text to curves etc.