I should have posted that I have 64 bit Win7. I doubled clicked the app in a folder and it attempted to run but I got a message that it was not supported. I'm wondering if there's a way round it since some 32 bit programs run in this environment.
Being a DOS application it's almost certainly 16-bit rather than 32. 16-bit programs don't run on 64-bit Windows.
All is not lost! Grab VirtualBox
and a copy of FreeDOS
. You can then create a virtual machine that is 99.9% compatible with genuine MS-DOS and should run your program. The only problem may be printing, which could mean a bit of work. An alternative would be to create a VM with a 32-bit version of Windows (in which case it should be easy to set up your printer) - downside of that is that it will cost money (unless you have some old Windows disks lying around).