Set Free Supercharging by start and end date

I just used up 6,000 miles of Free Supercharging.  It kicked in on June 7, 2019 and I just ran out as of my last charging session on November 24, 2019.  When Free Supercharging started, I set my Supercharging to Free and then went back and manually added my costs to my previous charge sessions that weren't free.  I toggled back to Per kW charging and now I have 89 sessions I need to go back and zero out.  It would be helpful if there was a way to specify free charging during a date range, or to be able to mass edit charge sessions to save time.  I'm also experiencing a lot of issues with charge database rebuilding that is really slowing down my efforts.  Thanks for looking into this.