Not my job to debug Roxio software. Support is an assumption that appearently exist.
A bit of Background.
I ordered the NTX2 software because the Roxio Video Capture USB was a give-away item. The first impression from Roxio was being presented with an Answer that I should download the USB device and software from the Internet...?? I tried contacting Scotty but he was on Vacation so I wrote to the CEO. The effect of this was, the USB device was immediately beamed to me from LA. A few weeks later one came from London. Now I have two different Hardware revisions. Thank you Transporter room.
The intersting part of this is, The Video Capture HU3192-E I used with NTX2 doesn't work with NTX4. I just swapped to the other Video Capture USB UB315-E ver.3 and the Drivers immediately loaded. NTX4 Roxio Media Import accepted the Device and was opeartional. This is a good indicator in the direction of the problem. Again, It's a Roxio Problem, not mine. For giggles and grins I'll download Windows2016 from MSDN and try NTX4 on that. If NTX4 is halfway correctly programmed, the Backwards compatibility Mode should work.
My initial thought is if the software is tested? I'd love to see the Test cases and setup scenarios, along with intensity of Hardening used.
If I was to debug this, I'd say the NTX2 deinstallation leaves Data droppings in the registry. The new NTX4 Install can't use this and refuses to Install the Drivers, because it is the opinion they are installed. The other option is Hardware revision recognition and the Drivers, if new are faulty.
I'd deinstall the Software, check the Registry for the Data Droppings [search for Roxio, Data Capture and other such criteria]. Delete the data Droppings and reinstall NTX4. I'll get back with you after I find interest in Updating to Windows10. Check you Updates there is a completly new Build available on the Update Server. It is installed using the std. MS Update. Bring lots of Coffee, the update is a complete OS Exchange and is huge.