missing co-pilot conversation history after update:

I have worked with the personal version of Copilot in many contexts over the past year.  I even made a Youtube video about all the ways I found to use Copilot.  Now after the "upgrade" every one of my threads is gone!  I am willing to switch to a paid service, but I want my conversations back as they represent an enormous investment of my time in the Copilot environment.