Yes, I am still running Crashplan also until I am have gotten a complete backup with Duplicati to work. I believe I am seeing the same problem with Crashplan locking the sqlite file as was mentioned in the posting you referred to. I changed my Crashplan backup to exclude that file. I was able to complete a backup with another 150 gb of data uploaded.
I have about 300 gb more to go, but I am adding the data to my backup in small chunks so I can make sure everything is working.
I am hoping this problem is solved. I will run the rest of my backups and post if there any more issues. Thanks for your help.