STOP! This is a very early beta of Top Task List. It does allow syncing tasks to OneDrive, so you should not lose any tasks. BUT IT IS VERY INCOMPLETE otherwise. Please only use it if you are comfortable being a beta tester and willing to deal with software before it's fully ready for mass consumption.
If that has not deterred you - welcome to the beta testing! Your help in shaping Windows 8 version of Top Task List is appreciated. You can submit your feedback and suggestions here: http://toptasklist.uservoice.com/forums/159649-feature-suggestions
(you have this link in the help page from within the app)
