Once installed, please provide desired user groups the permission 'Conversation Folders'.
In addition, you may wish to change the maximum allowed number of folders. This is located in the add-on's options page.

Features List:

• Organise your conversations by assigning them to different folders.
• Option to display conversation totals above each folder. Totals reflect results of any applied filters.
• Folder display order can easily be changed at any time.
• Conversations can be moved between folders. This can be done via in line selection, conversation edit, or conversation view.
• When starting a conversation, you may assign it to any one of your folders.
• When a folder is deleted, all assigned conversations are moved back to the Inbox.

I hope you find this add-on useful.
Please feel free to report any bugs or suggest code improvements.