Lightroom 6 Crashes in High Sierra

Hello Abode,

Over the last three days I have been experiencing frequent LR crashes. It seems to happen most in the develop mode,  but has also crashed when creating a new collection set and when navigating in loupe mode.

I am using LR 6.0 stand alone app on a Mac High Sierra 10.13.6. I recently bought the upgrade from LR5 > LR6 when I updated my OS in July of this year. I have a number of catalogues I use -- the one I used most didn't have any issues to date, but one week ago I opened another of my catalogues, was asked to 'update' this for LR6 which I did, and this is the catalogue with the problems. I have not seen this in other catalogues, but I haven't worked them as much either.

The crash has occurred with minutes of opening, and sometimes within an hour or more.

Some triggers I noted -- all below happened within 2 hours last night:

     - Crashed in develop mode. Restarted program and it crashed again immediately.

     - Reopened. Crashed again within an hour, during develop - I hit the option key and it crasheded instantly.

     - Reopened. Crashed when I clicked on 'auto' exposure on the left.

     - LR quit while I was adding pics to a new collection subset in Library mode. Making virtual copies, too.

          A full restart of everything, app, computer, etc.

     - Worked for a couple hours, then a crash when i command-z to undo a develop step.

Turned off the Graphics Accelerator to see if that helps (one idea in a forum).

https://forums.adobe.com/message/7964317#7964317

     - Reopened, crashed again within 10 minutes. Now I am here.

Tried to find any other common errors in the report. No 'segregation' in report for instance.

Please help! I am in the middle of a job and this is crushing my timeline! I will post the report below. THANK YOU.