Thank you Kershaw for giving me such prompt help - on a Saturday!
I’ve run through all of the steps, and will give D3 a whirl shorty - I will report back for sure.
I did have one crash not long after restarting the game, but dropped a few settings down, and haven’t seen a crash since. Not ideal, but better than crashing! If I have another crash, I will open a help ticket.
Update - Part 2
I did have another D3 crash after running through the steps you suggested, and dropping a few settings down.
Turns out that my subscription to Norton 360 looks to be the culprit. There were times I was consistently losing internet or network connection, and those started right after Norton came online. Removed it and haven’t had a network drop or a D3 crash since.