I have had this happen to me a number of times, It's good to make it known so the Devs can work on it. A quick fix I've found is to just change jobs and then changing back, which should put you back at the proper level of graphics. If it doesn't work then you must just have a different problem than me all together and like others have said, may require contacting a GM. Until they get it fixed I don't think reinstalling or anything else will help though.