Hello Xavier, I tried today to repeat all the process I did yesterday, trying to make it crash again and I think it have to do with the standalone editor, if you push a preset with more voices than the unit can handle at the time regarding other instruments, it crashes, but I tried again to be sure and now it does not allow to push the preset, so not really sure about it.
For now, to be save and not loose any preset again, I saved all other instruments with 0 voice, so that way, should not happen again. Will let you know if happens again.
Thanks anyway!!