I need to find out if we are using a plugin (Base64 utilities plugin) in any of

Go to the suite/admin application and click on plugins to see what is installed.

Suite/admin is the appian administration console by the way.

There is no way that i know of to know if a particular application is using the plugin however.

Thanks Benjamin. I cant see that information on the admin console as we are not running on the required version of appian. However I can check that on the file system. Having a plugin installed does not necessarily mean that it is being used, but I guess it all the information we can get.

If you export the application packages you want to verify, you can then perform a local search against the contained XML files (i.e "find in files") for references to the smart service keys (as defined in appian-plugin.xml) or function names you are analyzing.