Thanks for your replies.  I have 3 computers all running Windows 10.  The 2 older ones have the Pro version and the new one the Home version. The Simple Accounting program is installed on all 3 from the same CD.  The program runs well on all 3 and the back up loads right away from the oldest to the second oldest computer but won't load into SA on the new one from the memory stick.  The files on the stick open OK with file explorer but won't restore into SA.  It just keeps going back to the start up screen.  I tried it out on another brand new computer with the same result so I think you may be right.  I only need it for another year so I can manage with my second oldest computer.

thanks again for the advice. 

Thanks for your replies.  I have 3 computers all running Windows 10.  The 2 older ones have the Pro version and the new one the Home version. The Simple Accounting program is installed on all 3 from the same CD.  The program runs well on all 3 and the back up loads right away from the oldest to the second oldest computer but won't load into SA on the new one from the memory stick.  The files on the stick open OK with file explorer but won't restore into SA.  It just keeps going back to the start up screen.  I tried it out on another brand new computer with the same result so I think you may be right.  I only need it for another year so I can manage with my second oldest computer.

thanks again for the advice.