Lost data!!!

After Mac application crashes almost all data synced to Dropbox is lost every single time (Yosemite, Dropbox, Mac version 2.2)! Version 2.2. crashes every time I press undo (Ctrl-Z) after creation of a new list. I have not used my Mac and iOS versions of 2Do for almost a year due to 2Do sync problems. This was an attempt to make a come back. But during the day I had to reconstruct my database 3 times. This is a no-go for me.
Never experienced a single loss of data with OmniFocus 1/2. This is not acceptable.
Functions-wise 2Do looks very attractive, however quality is below par, especially related to sync.

expersona about 2Do, v2.2