it is possible to remove number in front of a preset filename and organize the preset order only in index.txt? I mean that "001_Bingobongo.kfx" maybe could be "Bingobongo.kfx" and in index.txt Bingobongo is on the second line, and karme should read the order of presets from index.txt and not from filemane!
Yes, if you delete the index.txt file, the synth will autogenerate it!
However, the patch numbers in the filenames need to be there, so
it's more like your name/order your patches in the directory, and have the synth recreate the index file.