In order for your custom content or any other RPC's that you may have downloaded previously, to work properly in the new software you'll need to index the content in AVAIL.
To do this:
1. Create a channel in AVAIL.
2. Drag and drop all of your custom and/or existing RPC files into the channel. Follow the prompts.
3. Once your content is indexed you can start Revit and begin to drag and drop that content from AVAIL browser. Any content that is already placed should render fine.
4. One of the best things about AVAIL is the ability to tag and organize your content. After you have indexed your content you can organize your channel.