I'm managing a wordpress site that was developed by another party, and they put a bunch of plugins in the mu-plugins folder. These plugins can't be updated via the default interface of WordPress, and must be updated manually.
I can't find any details on how to correctly update these plugins. Is it just a matter of replacing the current files with the updated version of the plugin?
An additional question: can I just transfer these plugins to the plugins folder, or would there be a risk of the plugin/site breaking? Assuming all these plugins are correctly programmed and available in the WP plugins directory.