Use the Object Manager (File > Open > Object Manager (Alt+O shortcut)). Choose Extensions and all installed RTX extensions will be listed, select one or more and click the Delete button to remove any unneeded ones. Any deleted extensions can be reinstalled at any time using the RTX Extension Manager (File > Open > RTX Extension Manager).
Use the Object Manager (File > Open > Object Manager (Alt+O shortcut)). Choose Extensions and all installed RTX extensions will be listed, select one or more and click the Delete button to remove any unneeded ones. Any deleted extensions can be reinstalled at any time using the RTX Extension Manager (File > Open > RTX Extension Manager).