You can find this out using LicenseManager option Check License. Usual location:

  • All users
    • Windows Vista / 7 / 8 / 10: C:\ProgramData\Innovatrics\iengine.lic

    • Windows XP: C:\Documents and Settings\All Users\Application Data\Innovatrics\iengine.lic
  • Just one user
    • Windows Vista / 7 / 8 / 10: C:\Users\<user>\AppData\Local\Innovatrics\iengine.lic
    • Windows XP: C:\Documents and Settings\<user>\Application Data\Innovatrics\iengine.lic