How to upgrade to the latest version

please let me know how to upgrade to the latest version i have 4.2 and its live if i upgrade to the latest version do i need to uninstall my 4.2 and reinstall the latest will it not affect my database?

thanks

Dona backup then download and install 4.1.82 and it will upgrade your database automaticaly. Then just open samna as normal, no need to uninstall anything

BTW there isnt a 4.2 the latest version of V4 is 4.1.82