Now we are using the 'Mali_Texture_Compression_Tool_v4.2.0', but we found we could not save the picture.
Why the picture could not be saved? Do we have to buy the business version? How to buy it? And how much of it?
There is no commercial version - the download on Mali Developer is fully featured.
I would guess you are clicking on one of the original uncompressed input images, and trying to save that, rather than saving the compressed output. Click on the "Compress selected images..." option.
The problem was solved, thank you very much!!