Basecamp does not recognize Edge 1000 anymore

Hi, since a few weeks Basecamp (4.6.3) does not recognize the Edge1000 anymore. I'm using High Siera (10.13) on mac. The device is recognized by the mac and also works fine with garmin express. Only basecamp won't find it. I didn't update basecamp for a long time (so it can't be the basecamp version that is causing this), but I think I updated to High Siera not long ago. Can that be the issue? Any help would be appreciated!