I assume you’re on version 1.20? On the fitgirl page they have a section for updates that go up to 1.23.1, but be aware that you have to do it in steps, meaning you have to download and install the first one before moving on to the next one. They also have a link to the cs.rin.ru forum page, which has all the same updates. I’m not sure how religiously fitgirl keeps them up to date for every game, but it may be worth to keep an eye on the forum page just in case they miss one in the future