With no suggestions or advice forthcoming,I decided to return to the latest Blackhole image,then using the Meoboot plugin,which comes with this image, I installed OpenPli.Now I can switch from terrestrial to sat and back again with no spinners,green screens,or freezing.This may not be the ideal way to solve this problem but it works. Hope this might be of help to someone.
All I know about it, is, it works with af9015 driver,and its got DVBT USB Dongle printed on it.It has been working troublefree for a few years with various images.This is my first venture into Pli.Thank you for taking time to reply.