I have also tried all the suggestions that Jay has recommended and I am still experiencing the same problems. Excel 2016 not responding when trying to load multiple workbooks. I have reduced the number of open workbooks to 3 and have had slightly fewer crashes (not enough to say its a workaround). Even with this, I still freeze up when the yellow row/column highlighter is turned on and I try to copy/paste large amounts of data. Kutools seems to be hit of miss on when Excel will quit responding. My only workaround to to hit the save all button before I do anything using Kutools. If I forget I will lock up and lose all the data that was imputed after the last save. Even auto-recovery in Excel won't always have all my data after a crash.
My first thought was maybe this could be a computer memory problem, but my resources show I have better then 50% available memory even with multiple Excel workbooks and/or programs running. I have used Kutools with all prior versions of Excel (2003,2007,and 2010) without any issues, this is exclusive to Excel 2016 only.
I hope someone figures this out before my 5 year license expires. I really do like all the features of Kutools and would hate to see Kutools go away because 2016 doesn't work with it. Unfortunately, I am forced to use Office 2016 because my current employer requires it so reverting back to 2010 is not an option.