Your program is great! It has several additional features compared to sfxr, bfxr etc. I loved the "impact" style! Very useful! But I also missed some things: undo and redo buttons. Without them we have to be very careful when making changes. If we want to go back to the previous state it is difficult to get it right perfectly. And it's not possible to Load Preset. I tried in the linux version and here in itch.io.