I have just installed on Mac OS X and whenever I try to add a task the app crashes out. 

For issues with beta versions, please send your comments or questions to

How do you know it’s a beta version?

The Mac version is only beta.

Please see the download page which mentions this, and gives instructions on how to proceed with any issues you may have when testing beta software.

Questions on general use can probably be answered on this forum, but unfortunately issues with things like crashes cannot. Sorry Mike.