Please send a message with description of your problem to our support team at support@vintasoft.com. Message must contain the following information:
1. Name of your scanner
2. Snippet of your code
2. Screenshot which demonstrates the problem
Sorry, I was not attentive and have misunderstood your question. You are asking about modal UI, not about enabling/disabling UI.
About modal UI: User Interface will be shown as a modal dialog if value of the ModaulUI property is set to True and as non modal dialog otherwise. Sometimes you should set the value of the Parent property before using the ModalUI property.