Thanks for the suggestion Giratorh, but the "Underwater weapons reaction fire" option is already off. It always has been. Also, the game immediately crashes when the month ends, when the fundings screen is supposed to appear.
I don't have any shortcuts enabled. Right now I am using kyrub's version in tandem with xcomutil, with the link provided by Bomb Bloke. I'll test it out with your extender when I have the time. If anything comes up, I'll report it.
I got a problem. With Tycho's extender enabled, I can't scroll in the battlescape. Also, the 'Assign all personnel', 'Auto sell' and 'initial base' mods are not working.