HDR and other new things are not presets for LR5, but features in a new version - Lightroom 6/CC.
This is not a free update, but a paid upgrade. (If you are a CC subscriber, the new version is included with your subscription.)
To upgrade, go to Products - scroll down to LR, and click Buy, then Upgrade.
You may have to change your country at the bottom of the screen.
You can also download a free trial from here: Digital photography software | Download free Adobe Photoshop Lightroom CC trial
In case you did install LR6 - HDR is invoked by selecting 2 or more photos in the library, and pressing Ctrl + H.
Thank you Per Berntsen, for answering my question...Have a wonderful day!