I am having the exact same problem as $PennyMover. Except I have to correct this version number. The problem is with version 6.0.13.
I was using 6.0.12 but updated to the .13 today. My app is also crashing and completely unusable on Android using version 15 O/S.
I tried clearing cache and memory, de-installing it, re-installing it, all to no success.
How can we roll back to the .12 version? I do not see any option in my settings to delete the last update. I believe you will need to take it down and put back version 12 while you work on a fix.