Shine can also run as a plugin tool within DaVinci Resolve. The rest of the Shine user guide details how this tool operates within Adobe After Effects. You get almost the exact same functionality within DaVinci Resolve. However, in case you're new to Resolve, let's walk through some of the "getting started" steps.
To begin, start a new project.
Within the main Resolve interface, switch to the Edit page. Right-click in your media pane, then select Import Media... Locate your desired media from the pop-up file explorer, then click the Open button.
Another pop-up may appear asking if you want to change the project's frame rate to match that of your clip. Unless you have a reason not to, go ahead and click Change.
Your clip should now appear in your media bin. Drag and drop it onto your timeline.
Now go into the Effects Library on the left side of the Resolve UI. Navigate to Open FX > Filters > Red Giant > RG Blurs and Glows > Shine. Drag and drop Shine onto your timeline clip. Expect to see a before-and-after effect something like this:
And that's it! You now have Shine up and running.
But...how can you control Shine's directionality? For this, you want the control handle, that little blue overlay dot. Simply click on it and drag it around to see the impact.
If you can't see the control handle, that's probably due to the Viewer Selector Overlay menu defaulting to Transform. Use the pull-down menu to change this to Open FX Overlay, as shown below.
And one last little trick: If you still don't see the control handle, you may have to engage the Shine effect on the right under the Effects tab, then the Open FX sub-tab. Collapsing and then expanding the Red Giant Shine parameters should turn the handle visible.