I'm not too sure if it will work, but chances are that you're going to have to download a bunch of trucks from here and hope that the missing files that cause the crashes on 0.37 fix it. I'd recommend downloading some truck packs that people posted over the past few years, maybe those include the missing files. Once again, I'm not too sure if it'll work, but I guess it can't hurt to try.
If you really want to stay on 0.38, I can't help you, because I have absolutely no experience with it.