Although it depends on a case-to-case basis, databases may rely on a variety of 3rd party plugins. Here are a few suggestions regarding plugins:

Contact the developer of the plugin to assure it is compatible with your current OS and 4D version

Download the latest version of the plugin that is available on the web

Test the latest version of the plugin in the targetted 4D version in an development environment to assure everything is working properly

The last thing you want is to upgrade your 4D database and realize the majority of plugins do not work in the latest version so be sure to take the precautionary steps beforehand.