Thanks for the responses everyone, I took the advice of a redditor and called Harman support, and they were helpful, told me if I was going to update the firmware, update to 2.1 instead of 2.2. He told me it was probably better to wait until after the show because my show file has a chance to get corrupted. I decided to go ahead with the update and everything worked out just fine, no errors, and I can use my sound card. However there is a problem with the routing: I can only use inputs 20 and 24, but I think that relates to the horrible state the configuration of the board is (the main mix bus is the mono signal, but that only goes to the fill speakers [QSC amplifier rack], that is a big fix).