My school bought our ETC Express 125 light board about 7 months ago used. I finally today decided to figure out all the OS of the board and the serial number of the board. The OS is 1.02. I logged into the ETC sight and saw that the current OS is 3.1 My question is, should I upgrade the OS? I don't have a show running now, just the basic set-up, which is backed up on a floppy. Why should I upgrade the OS? What will it accomplish? Also, I see the .bin file to download. Is there a special way to put this on a floppy, or do I just copy the file on it? I'm on a mac, and I just want to make sure I don't crash the board while trying to do this. Thanks! EDIT: Also, I'm on a mac. My computer creates invisible files (.ds store and .trashes) on the floppy drive when mounted. Will the board know to ignore these files/folders, or should I go and delete them?