The version on my GL300K controller is 4.3.14 and that is the latest. I don't think it can be updated independent of the controller firmware. I have the same problem with CrystalSky. It is stuck at 4.3.16. Researching discussions on CrystalSky, it seems the problem may be that it has a 32 bit processor and the latest versions of the app are being developed for 64 bit processors. The CrystalSky may not see another update. I suspect our displays also have 32 bit processors, so we may be stuck with what we have.