Hi,
you haven’t to rename it ! bbPress is part of buddypress as the integrated group-forum software and as is, use the BP theme or child theme.
bbPress themes are here: wp-content/plugins/buddypress/bp-forums/bbpress/bb-templates/kakumei
If you want to use bbPress separatly as standalone forum, you have to activate the bbPress plugin. The forum activation lets you choose for such an install. (group-forum and/or separate forum) and install the plugin automatically.
The buddypress theme (bp-default) sits in wp-content/plugins/buddypress/bp-themes/bp-default
WP themes are in wp-content/themes/
If you use any other theme, it must be placed in the same directory like this:
wp-content/themes/your-theme
or
wp-content/themes/your-child-theme
@Chouf1 The bbPress plugin does things slightly differently, and you can use a bbpress.php file for its main templates. This should be explained somewhere if it’s not already on the bbPress codex. 🙂
@davidkooo BuddyPress doesn’t work like bbPress in this way, yet. You’ll have to go deep into the BuddyPress templates in your (parent?) theme.
@djpaul templating is a bit confusing between bbPress (shipped with BP) for group forums and bbPress as separate plugin for a single forum. So if i understand you and the codex, i can change the bbPress template for group and/or standalone from a bbpress directory in the child theme, and in the case of the standalone option, using bbPress shortcodes ?
https://codex.bbpress.org/theme-compatibility/