Can't upgrade – Productivity - Daily Planner Review

I tried upgrading a few times but nothing is happening. The app crashed about 3 times. I like the app and it seems to have the elements that I am looking for to organize myself and to infuse some motivation and drive back in to my life. It is disappointing that it keeps crashing. I would have paid the $19.99 to upgrade but the app won't let me so I guess not.
Review by NurseFlyer on Productivity - Daily Planner.