That probably doesn’t help; The application could be developed by yourself, a company not supporting it anymore, or out of business for years. Despite of Windows versions/alternatives, you may still prefer, even forced, using it for various reasons and time to come.
One option is to install a virtual Windows 32-
vDos emulates a DOS PC in Windows 32 or 64-
Some vDos highlights:
vDos is a Windows program to conveniently run DOS applications in all current Windows versions.
vDos by JHM Schaars -
…Microsoft dropped 16-
“To find a version for your PC, check with the software publisher.”