It's amazing sometimes how that helps things. Another thing it can help is if you use a lot of high time compression, and lose most of your audio, just Save, Exit, Restart, and magically it's all back... Usually.
If you didn't clear your Save folder previously, and you're pretty well into the new career, let the sleeping dog lay. Just do NOT load an old save from the previous version, or use a SingleMission created in it, else you might trash things...
