As you say, software can be very strange. I downloaded the patch, installed then found that my AOL B/B would not connect. Did a re-install of AOL program and it worked fine, thought, this must be just coincidence, so I removed the patch, reloaded it and once again AOL would not connect.
I think this is because I was opening the file, instead of saving it, then exit from B/B, install patch and re-connect to B/B. The save to drive then install is the normal way I do these downloads but M/S site said it would be fine to open from source and install. j.