Airport Basestation after doesn't work after midnight!

Airport Basestation after the recent update stops working after midnight for the last 3 nights. Was up til 2am and still nothing. During the day it often goes into some kind of stealth mode where it's invisible to my Macbook. Brilliant! It usually takes about 20 searches to find it again. Apple!! When they update - it always cocks-up my system. I bought Mac to free up all the time wasted on my PC fixing problems...But Mac's getting just as bad. Airport has been a huge let down....and an expensive one.