Ecco pro has been working for years, now fails with "unable to complete command"

Running Eccopro on a Windows 7 Pro computer.
 It's been running well for years.
 It was installed using the file EccoProX64_4677.zip back when Compusol was working.
 
 
 Now when I start Ecco I get the message “unable to complete command”.
 When Ecco is working correctly, what I should see is the alert box.
 
 
 Please see the attachment.
 
 
 How do I correct this problem?
 Thank you for your help.