Problems Since Upgrade to OS X Yosemite 10.10.1

I had been using Planner Plus on my MacBook Pro and on my iPad and syncing through Dropbox. Up until the Yosemite upgrade, I would have rated it as five stars. However, after the Yosemite upgrade, Planner Plus Version 2.1 on my MacBook no longer works or syncs with my iPad. I think a major fix and upgrade is needed??? Will that happen soon?

LK Planner about Planner Plus - Daily Schedule, Task Manager & Personal Organizer