Perhaps you should ask in the Bridge forum instead of the Lightroom forum.
To open images in Lightroom you need to start Lightroom and then use the import function. Double clicking on an image will not open it in Lightroom. Camera raw is a plug-in for Photoshop, Photoshop Elements and After Effects. It will not work with just Bridge. If you have installed Bridge then you also need to install Photoshop which is also part of the creative package. Then you can use Bridge to access your raw files and open them into camera raw. The way you have things set up right now with just Lightroom and Bridge, you can only open your raw files by starting Lightroom and using the import function. Lightroom is not affected by the Camera Raw plug-in.
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It's as Jim says, to be clear Lightroom is a complete standalone application and does not require you to have any other Adobe Products installed on your computer.
(Bridge and Adobe Camera Raw require Photoshop and / or other products from Adobe.)
Thanks a lot
I'll try also Photoshop CC PS instead of Lightroom