I've got an e-mail from Lukas saying that there is some big holiday going on in Czech Republic these days, but as soon as they come back and start to work again, he'll take a look at my miniDMP file I sent him. Also, I believe he will give us answers regarding these zero-sized files, leftovers in log subfolder. I belive that there is no reason to doubt that all those miniDMP files with 0 as file size, can be safely removed manually without any consequences. After all, there is absolutely nothing inside those files... but, as always it's better to get confirmation from Alwil first.
Cheers !