So I tried to open a SW part tonight to make a minor change, and it tells me "Activation transaction failed" "Serial number expired". Then, "This Student Edition has expired". It sends me to www.solidworks.com/goEDU, which doesn't work. The first time it said the server was too busy, now it doesn't respond at all.

I tried renaming the FLEXnet folder, no difference. I tried deleting FLEXnet folder, no difference. I tried un-installing, downloading SW again and re-installing, no difference. I was emailed the exact same key I already had.

Ideas? Suggestions? This is on a Windows 10 PC on which it ran fine the last time I used it, a couple of months ago.