Hi Leo thanks a lot for the help, the custom "redo" that we see at the bottom was a script that i found here
i never used it except the day i installed it, it stayed there since then. i'm trying to remove it to see if it's what crash the files. i removed it from the list of script in parameters, but it didn't changed anything but it's still there in the menu visually, i'll try to remove it (don't remember how to do it lol, must read again the topic about it) and if it still crash, i'll follow your advice. i'm a bit worried about all the personnal info, so i'll investigate the file before sending them to you in private message. thanks for the help !