I keep trying to download geocaches to my Garmin eTrex 20. (Used to be able to do this without any problem). Now keep getting a message that I need to install the comunicator plug-in. I have - several times, plus re-booting each time. My laptop says its installed, but I still can't download. Have to keep entering co-ordinates manually which is a chore. I'm runnin Windows 8.1, but I;ve also tried on Windows 7 and get the same message.Anyone got any ideas?