If you bought a used Anajet Sprint, Anajet FP-125 or Melco Jet, it may have come with old, outdated software. It also might not work after install on your computer because it actually needs a EKPrint Studio License Transfer. Who woulda thunk.....
You will need to contact http://www.eukondigital.com/transfer
The upgrade version EKPrint Pro will include Windows 10 driver and the upgrade fee is $250 (at this point in time 2018).
Your EKPrint Studio serial number looks like this EKA119-03-10-XXXXXX (mix of letters and numbers instead of X's).