Like some software out there are demos and run out after 60 or so many days
unless they have some code to keep it going, can it be done with an Excel
workbook?
I want my workbook to be used for so many days and then they will have to
upgrade to the next version. I'm not charging the users anything to use the
workbook, but my employers are not paying me for something I've done on my
own time.

Thanks,

Mr BT