Bill I did have an issue with 4.54. I had shut it down this a.m. and this p.m. noticed pc was slow and looked on task manager and saw cpu was at 100% even though no dc running on task bar. I noticed the file that was 100% was something like "4.54_windows_intelx86". So I had to manually kill it. You had any problems with it not terminating when exited?