WinStars is shareware. This means that you may use it freely. However, certain functions (As the access to the entire Gaia DR2 catalogue, the high resolution textures, the DSS function and the supplementary modules) are temporarily disabled.
If you wish to use the complete version of the software, you should purchase a user’s licence (this license is valid for the Window version). The full version of WinStars 3 is free for Linux !
How to make payment ?
A personal licence costs 6 €.
Use PayPal, a secure system of payment by email to receive your personal key immediately :
How to activate the complete version ?
After installation, select the “Buy WinStars 3” menu and enter your email and your personal code.
A message will confirm to you that you have just activated all the functions of WinStars.