there is no option to Export all datas to an excel file format or access or outlook or ...
specially to a Doc ! because maybe someone like to print tasks and stick it on the table or wall !

When you have an export option, so you need an Import option . so you can Have a Backup & Restore for users . specially someone maybe like to copy his structure to another one !
so he can export all data to a specifiec format, then import it to another account