Hi, I'm new here and would much appreciate some assistance!
I am having a somewhat similar problem and have spent many hours trying to find a solution. I have also looked on the net and YouTube.
Amongst others I have the 'Sounds Unique' Pack from Dave Woods, TTT. This works well if run from the USB and so some years ago I copied it to the HDD. Again all sounded OK except that the 'Tijuana Taxi' style didn't work. The USB has that style file on it and TTT have just kindly re-sent the style file in case I have a corruption problem. Again as long as the USB is inserted the style is correct, unplugging the USB and it is still correct, but if one switches to any other registration and back the 'Tijuana Taxi' style file is missing.
I enjoy playing for my own pleasure, so am not into editing or creating registrations, but I read somewhere that I should be able to press 'memory' and the relevant button for that registration and it should be saved - but it isn't!
I have noticed this sort of problem happens with just one other USB registration set - the Schlick James Last Packet. Copying the USB to the HDD fails to add any of the styles.
Does anyone have a solution?