While we're waiting for an updated installer with the fix, you can do the following to resolve the issue on your end.
Open up services.msc and pause the "leap service"
Navigate to C:\Program Files (x86)\Leap Motion\Core Services
Open LeapSvc.exe or LeapSvc64.exe in a hex editor and search for
C6 1F DD 6B 0F 81 D0 11 BE C7 08 00 2B E2 09 2F
Replace that with
B9 7A 3E CA C3 B4 E6 4A 82 51 57 9E F9 33 89 0F,
Return to services.msc and restart "leap service"
Launch a Leap Motion enabled application and test
Please let me know how it goes.