Windows 10 update derailed the dialer

Yesterday RingCentral worked flawlessly.  Today, I tried to click on the web based phone number to dial.  just like I have always done.  Nothing.. Now, After review with the Ring Central team they tell me it “should be” right.  I DID notice that although Windows shows RingCentral in the app Chioces, the TEL protocol is absent. Yesterday the Ring Central icon was there,I cant select ring Central as the default app. Anyone else see this issue?