Speed up iGO

Hi all,

I have a china no name device with wince 6 and 256 mb ram
I have tested iGO Primo 9.6.13.405512 and NextGen Mappy with HERE 2016.Q2 maps.
This software's and maps works but its to slow.

I have 408 license files in the license map, maybe i can use only licenses i need?
I have delete all maps, buildings, tmc, phoneme, speedcam and poi files i dont need.
I have only Netherlands, Belguim, Germany and France files.
Also i have deleted all the content inside dem.
I dont use TTS and i have only 1 file for language and voice.

When i listen to music on a sd card iGO is crashing, listening radio no problems.
Which files can i remove to speed up iGO?