Starting OStats
When you first start up OStats you will find that nothing happens! OStats is designed to be a tool for exploring data and doesn't come with any interface for actually entering data. There are much better tools for managing your data (such as a spreadsheet or database). Use File - Open or Edit - Paste in OStats to import your data.
Example
The simplest way to get started in OStats would be to use a text editor to create a file in the following style:
Sex,Height Male,180 Male,178 Female,167 Female,162 Male,182 Female,159
Note that the first line must give the names of your variables with the remaining lines corresponding to the cases in your data. (You can separate variables with commas, tabs or spaces.)
Save this as a text file and open it from OStats. Or select all, copy and then paste into OStats. All the menus in OStats will then be active and you're on your way to exploring your data.