On the Prepar3D site, a changelog for Prepar3D v3.3 has been published, in addition to the actual release of v3.3. A number of fixes and new features are present in the changelog and I recommend you take a look at it before you decide if you wish to update as there doesn’t appear to be anything major in my opinion. To obtain the new update, you’ll need to download it from your Prepar3D.com store account.