GoodNotes Mac 1.1.6 extremely unstable with Mac OS Sierra

Until there is a software update providing compatibility with Mac OS Sierra, I would be extremely reluctant to purchase this app. I have had the public beta of Sierra since its iniital release and with each release the Mac version of GoodNotes crashes once a connection is made with iCloud Driver. Without the connection, it works fine but since most of us purchased GoodNotes Mac as a convenient way of getting documents to and from our iPads, GoodNotes Mac serves little purpose without the ability to synch with iCloud Drive. I am currently using the golden beta of Sierra which should be the one released to the public shortly and there appears to have been no effort by the developer to correct this problem. Thinking that there could be a document that had been inserted into GoodNotes, I have even gone as far as deleting every GoodNotes file but once a file is inserted, the crashes continue. The developer appears unresponsive to the problem.

Jgreenatty about GoodNotes, v1.1.6