As per their release, "X-Plane 10.45 is a “small” patch for us in that it doesn’t contain major changes to the code, but it contains a number of features you might like."
An update to the global airports. The global airports won’t conflict with custom scenery – new exclusion technology prevents overlapping buildings. Nav data has been significantly updated – lots of bug fixes are in 10.45. The GPS data for the G430 now contains IAFs, so you can fly GPS approaches with proper transitions. Proper prop torque for aircraft that opt in.