Hi akosnitzky!
You only need to register on our forums, and then you will be able to enter your forums username and download the application for free.
You can register to our forums at the following URL:
forums.sbsh.net/index.php?act=Reg&CODE=00
Once you have your forums username you can download the application at the following URL:
sbsh.net/products/blackberry/calendar_pro/download
If you come across any problem let me know and I'll be glad to assist
Enjoy!