I am having issues with my computer seeing my InReach Mini. I have tried 2 different computers one using Windows 8 and the other using Windows 10, using numerous different cables, plug in and letting it power on, already having it power on and then plugging it in, going back to a previous version of Windows 10, using Garmin Express and also InReach Sync. The unit shows it is charging. I need to be able to update the firmware... Any help would be appreciated