Yesterday I used the Mac application and worked a lot. I added a lot of new tasks and went trough many of my tasks and moved them in order to arrange my schedule. I didn't use any other application or web browser after this. Today as I came to my office and opened the application I realized that every change I did yesterday was gone and all the new tasks I added are also gone. Please tell me how to fix this because I worked around 2 hours yesterday arranging everything and I do not afford to do this, not to mention that I don't remember each tasked that I added yesterday, and now I don't know what I have to do. This is simply unacceptable.