Since Christmas, all the Insider preview builds have caused me grief. I had hoped 14316 would have a better Edge, my ordinary upgrades of W10 seem to work ok with Edge. When I left click on the top rhs cross, I expect Edge to instantly close, which only works about 50% of the time. Then I have to open task manager to kill it off. Sometimes it works the other way round. I close Edge, and it doesn't open. It is still running in task manager, and has to be forced to close. Any clues?