Since updating to firmware version 5.50, I seem to be having a lot more issues with my Edge 530. The main issue that I'm having now is that it's failing to form a light network, something that never happened before updating. The firmware was initially installed via the Garmin Connect app from my iPhone. While troubleshooting, I backed up my .fit files and did a full factory reset, but still am having no luck. I am leaving for a 3-month bike touring trip in a couple weeks so I need a version of the firmware that I can trust. Was the last major public firmware version 5.10 or 5.20? Can anyone tell me where I can download those files? I can't seem to find them on Garmin's website now that v5.50 has been released. Thanks!