Cannot add models (.dll's) in HX & HT programmer

If using Win7 or above, ensure you have installed the programmer as per the guide:

https://www.entel.co.uk/assets/resources/support_documents/Installing-and-Using-Entel-Programmer-in-Windows-7.pdf

Ensure you run the programmer in compatibility mode.

If required, re-install Entel Analogue Programmer to clear the runtime error.