Thanks, Dan. A Plugins folder was automatically generated after installing SpaceNav via Marketplace, and originally I had placed the LeapMotion folder inside of it (inside of project folder), but I got an Entry Point error,
I can't find where I read this, but am certain I read correctly (not through your site) to place the LeapMotion folder at the top level of your project directory, not inside the Plugins folder. At least my project could open now, but predictably the LeapMotion plugin isn't found. To confirm I'm downloading the correct version for UE4 4.26.2, I don't see the ".2" on the end, but this link would seem the most appropriate. Thanks for helping me through this.