I have attached a pdf in the hope that others might find them useful.Ted, Kees,
Especially for anyone who may have had their QCX from the USA stockist before 27 May 2020 the fuse settings must be checked and changed if necessary.
explains and also shows Avrdudess which along with Avrdude seems to be used by many.
(There are other programming softwares, Khazama is one dedicated to the USBasp.)
73 Alan G4ZFQ