FWIW, I am running VWS v14.00 p101 and have just about always had memory leak problems with VWS since 2005. Startwatch is the only thing keeping my system running 24/7. I get a restart once or twice a day and have Startwatch set at 150MB and haven't had any problems with it restarting successfully.
Perhaps the later versions of VWS don't exhibit the problem but my guess is that this is something Ed has never been able to isolate and fix. Not everyone has the problem and thus, the reason for it being a tough issue to find and then fix.